Full Length ISEE Upper Level Mathematics Practice Test

Full Length ISEE Upper Level Mathematics Practice Test

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ISEE Upper Level
Mathematics Practice Test 1

 
  • 47 questions
  • Total time for this section: 40 Minutes
  • Calculators are not allowed at the test.
1- Which of the following graphs represents the compound inequality 3  2 x  3 < 13?
(A) ISEE Upper Level Mathematics
(B) ISEE Upper Level Mathematics2
(C) ISEE Upper Level Mathematics3
(D) ISEE Upper Level Mathematics4
2- Which graph shows a non-proportional linear relationship between x and y?
(A) ISEE Upper Level Mathematics5
(B) ISEE Upper Level Mathematics6
(C) ISEE Upper Level Mathematics7
(D) ISEE Upper Level Mathematics8
3- A girl 162 cm tall, stands 270 cm from a lamp post at night. Her shadow from the light is 100 cm long. How high is the lamp post? 
ISEE Upper Level Mathematics9
(A) 800 cm
(B) 650 cm
(C) 576 cm
(D) 317 cm
4- Find all values of x for which 2 x2 + 15 x + 7=0
(A)  7, 13
(B) 8,12
(C)  7, 12
(D)  35, 12
5- Solve.
|1 \ – \ (12 \ ÷ \ | 1 \ - \ 5 |) | =?
(A) 2
(B) - \ 2
(C) - \ 5
(D) 5
6- The ratio of boys to girls in a school is 7:4. If there are 550 students in a school, how many boys are in the school?
(A) 350
(B) 250
(C) 200
(D) 400
7- The rectangle on the coordinate grid is translated 5 units down and 4 units to the left. 
Which of the following describes this transformation?
ISEE Upper Level Mathematics
(A) (x,y) ⇒ (x \ - \ 4, y \ + \ 5)
(B) (x,y) ⇒ (x \ - \ 4, y \ - \ 5)
(C) (x,y) ⇒ (x \ + \ 4, y \ + \ 5)
(D) (x,y) ⇒ (x \ + \ 4, y \ - \ 5)
8- How is this number written in scientific notation?
0.0000007685
(A)  7.685 \ × \ 10^{–7}
(B)  76.85 \ × \ 10^{–9}
(C)  7.685 \ × \ 10^{4}
(D)  0.0007685 \ × \ 10^{- \ 8}
9- (x \ -  \ 9) \  (x  \ + \  3) = 
(A) x^2 \ + \ 8 \ x \ - \ 22
(B) 2 \ x \ + \ 32 \ x \ - \ 27
(C) - \ x^2 \ - \ 6 \ x \ + \ 27
(D) x^2 \ - \ 6 \ x \ - \ 27
10- Which value of x makes the following inequality true?
\frac{2}{25} \ ≤ \ x \ < \ 25\%
(A) 0.27
(B)  \frac{7}{48}
(C)  \sqrt{0.169}
(D)  0.2981
11- Use the diagram below to answer the question.
Given the lengths of the base and diagonal of the rectangle below, what is the length of height h, in terms of s?
ISEE Upper Level Mathematics
(A) 2 \ s \ \sqrt{5}
(B) 2 \ s^2
(C) s \ \sqrt{15}
(D) 4 \ s
12- If the area of trapezoid is 168 cm^2, what is the perimeter of the trapezoid?
ISEE Upper Level Mathematics
(A) 40 \ + \ 4 \ \sqrt{ 10 } cm
(B) 4 \ \sqrt{ 13 } cm
(C)  10 \ \sqrt{ 3} cm
(D)  10 \ + \ 4 \ \sqrt{ 10} cm
13- Find the area of a rectangle with a length of 145 feet and a width of 68 feet.
(A) 10,340 sq. ft.
(B) 12,602 sq. ft.
(C) 9,860 sq. ft.
(D) 8,540 sq. ft.
14- Emily and Daniel have taken the same number of photos on their school trip. Emily has taken 3 times as many as photos as Claire and Daniel has taken 12 more photos than Claire. How many photos has Claire taken?
(A) 6
(B) 8
(C) 4
(D) 10
15- 93 \ ÷ \ \frac{1}{5} =?
(A) 512
(B) 610
(C) 46.5
(D) 465
16- 3 \ – \ 12 \ ÷ \ (5^2 \ ÷ \ 5) = ___
(A) - \ 1
(B) 4
(C) 8
(D) - \ 3
17- Emily lives 4 \ \frac{1}{5} miles from where she works. When traveling to work, she walks to a bus stop \frac{1}{2} of the way to catch a bus. How many miles away from her house is the bus stop?
(A) 3 \ \frac{1}{5} Miles
(B) 2 \ \frac{1}{10} Miles
(C) 2 \ \frac{1}{5} Miles
(D) 4 \ \frac{1}{10} Miles
18- \frac{8}{32} is equals to:
(A) 0.25
(B) 2.15
(C) 0.025
(D) 1.025
19- Use the chart below to answer the question.
There are also purple marbles in the bag. Which of the following can NOT be the probability of randomly selecting a purple marble from the bag?
ISEE Upper Level Mathematics
(A) \frac{1}{10}
(B) \frac{1}{4}
(C) \frac{2}{5}
(D) \frac{7}{15}
20- If (3.2 \ +  \ 3.6  \ + \  3.8) \  x = x, then what is the value of x?
(A) 10.6
(B) 1
(C) 0
(D) \frac{1}{10.6}
21- Two dice are thrown simultaneously, what is the probability of getting a sum of 6 or 9?
(A) \frac{1}{3}
(B) \frac{1}{4}
(C) \frac{1}{25}
(D) \frac{1}{12}
22- If a vehicle is driven 25 miles on Monday, 40 miles on Tuesday, and 22 miles on Wednesday, what is the average number of miles driven each day?
(A) 32 Miles
(B) 31 Miles
(C) 30 Miles
(D) 29 Miles
23- In the following figure, AB is the diameter of the circle. What is the circumference of the circle? 
ISEE Upper Level Mathematics
(A)  5 \ \pi
(B)  20 \ \pi
(C)  10 \ \pi
(D)  15 \ \pi
24- 48.32 \ ÷ \  0.05 =?
(A) 900.45
(B) 850.18
(C) 966.4
(D) 950.52
25- Solve for 4 \ x^2 \ + \ 8 = 24
(A) ± \ 4
(B) ± \ 8
(C) ± \ 16
(D) ± \ 2
26- With an 25\% discount, Ella was able to save $28.32 on a dress. What was the original price of the dress? 
(A) $113.28
(B) $120.10
(C) $112.94
(D) $121.32
27- Use the following table to answer question below.
This table shows the data Daniel collects while watching birds for one week. How many raptors did Daniel see on Monday?
ISEE Upper Level Mathematics
(A) 5
(B) 10
(C) 15
(D) 20
28- A circle has a diameter of 18 inches. What is its approximate area?
(A) 254.34 in^2
(B) 269.22 in^2
(C) 310.93 in^2
(D) 300.45 in^2
29- The sum of 6 numbers is greater than 240 and less than 380. Which of the following could be the average (arithmetic mean) of the numbers?
(A) 35
(B) 75
(C) 55
(D) 25
 
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30- Simplify \frac{\frac{1}{3} \ - \ \frac{x \ + \ 4}{2}}{\frac{x^2}{2} \ - \ \frac{3}{4}}
(A)  \frac{ - \ 6 \ x \ - \ 20}{6 \ x^2 \ - \ 9}
(B)  \frac{ - \ 3 \ x \ + \ 10}{6 \ x^2 \ + \ 6}
(C)  \frac{12 \ x \ + \ 10}{ \ x^2 \ - \ 9}
(D)  \frac{8 \ x \ - \ 12}{4 \ x^2 \ + \ 9}
31- The base of a right triangle is 4 foot, and the interior angles are 45-45-90. What is its area?
(A) 16 square feet
(B) 8 square feet
(C) 4 square feet
(D) 4.5 square feet
32- If 5 garbage trucks can collect the trash of 25 homes in a day. How many trucks are needed to collect in 200 houses? 
(A) 30
(B) 40
(C) 25
(D) 45
33- Which equation represents the statement twice the difference between 4 times H and 2 gives 25.
(A) 3 \ (2 \ H \ - \ 4) = 25
(B) \frac{1}{2} \ (4 \ H \ + \ 2) = 25
(C) 2 \ (4 \ H \ - \ 2) = 25
(D) 4 \ (2 \ H \ - \ 25) = 2
34- A floppy disk shows 840,128 bytes free and 698,589 bytes used. If you delete a file of size 552,129 bytes and create a new file of size 439,566 bytes, how many free bytes will the floppy disk have?
(A) 892,691
(B) 1032,623
(C) 983,123
(D) 952,691
35- If 4 \ + \ x^{\frac{1}{2)}}=20, then what is the value of 15 \ × \ x?
(A) 3,340
(B) 3,840
(C) 2,925
(D) 3,125
36- The width of a box is one third of its length. The height of the box is one third of its width. If the length of the box is 36 cm, what is the volume of the box?
(A) 1,728 cm^3
(B) 1,548 cm^3
(C) 1,317 cm^3
(D) 1,250 cm^3
37- Triangle ABC is graphed on a coordinate grid with vertices at A (- \ 3, - \ 2), B (- \ 1, 4) and C (7, 9).
Triangle ABC is reflected over x axes to create triangle A’B’C’.
Which order pair represents the coordinate of C’?
(A) (7,  9)
(B) (7,  - \ 9)
(C) (- \ 7,  - \ 9)
(D) (- \ 7,  9)
38- 7 days 21 hours 21 minutes – \ 4 days 14 hours 14 minutes =?
(A) 3 days 7 hours 7 minutes
(B) 3 days 7 hours 14 minutes
(C) 2 days 6 hours 21 minutes
(D) 2 days 7 hours 19 minutes
39- A square measures 6 inches on one side. By how much will the area be decreased if its length is increased by 5 inches and its width decreased by 3 inches.
(A) 2 sq decreased
(B) 1 sq decreased
(C) 4 sq decreased
(D) 3 sq decreased
40- A circle is inscribed in a square, as shown below.
The area of the circle is 24 \ π cm^2. What is the area of the square?
ISEE Upper Level Mathematics
(A) 100 cm^2
(B) 80 cm^2
(C) 50 cm^2
(D) 150 cm^2
41- 6 \ x^2 \ y^3 \ + \ 2 \ x^3 \ y^5  \ – \ (8 \ x^2 \ y^3 \ – \ 3 \ x^3 \ y^5) = ___
(A) 2 \ x^2 \ y^3 \ - \ 5 \ x^3 \ y^5
(B) 3 \ x^2 \ y^3 \ - \ 7 \ x^3 \ y^5
(C) - \ 2 \ x^2 \ y^3 \ + \ 5 \ x^3 \ y^5
(D) - \ 5 \ x^2 \ y^3 \ - \ 2 \ x^3 \ y^5
42- Increased by 45\%, the numbers 91 becomes:
(A) 122.31
(B) 110.87
(C) 131.95
(D) 140.12
43- How many 3 \ × \ 3 squares can fit inside a rectangle with a height of 35 and width of 18?
(A) 70 
(B) 73 
(C) 62 
(D) 52 
44- The radius of circle A is three times the radius of circle B. If the circumference of circle A is 12 \ π, what is the area of circle B?
(A) 8 \ 𝜋
(B) 4 \ 𝜋
(C) 12 \ 𝜋
(D) 10 \ 𝜋
45- Which set of ordered pairs represents y as a function of x?
(A) \left\{(3, - \ 2), (3, 7), (9, - \ 8), (4, - \ 7)\right\}
(B) \left\{(4, 2), (3, - \ 9), (5, 8), (4, 7)\right\}
(C) \left\{(9, 12), (5, 7), (6, 11), (5, 18)\right\}
(D) \left\{(6, 1), (3, 1), (0, 5), (4, 5)\right\}
46- David makes a weekly salary of $350 plus 10\% commission on his sales. What will his income be for a week in which he makes sales totaling $1,500?
(A) $500
(B) $540
(C) $480
(D) $620
47- If a box contains red and blue balls in ratio of 4 : 5 red to blue, how many red balls are there if 50 blue balls are in the box?
(A) 60 
(B) 40 
(C) 50 
(D) 70 
1- Choice C is correct

Solve for x.
3 \ \leq \ 2 \ x \ - \ 3 \ < \ 13⇒ (add 3 all sides) 3 \ + \ 3 \ \leq \ 2 \ x \ - \ 3 \ + \ 3 \ < \ 13 \ + \ 3⇒
6 \ \leq \ 2 \ x \ < \ 16⇒ ⇒ (divide all sides by 2)
3 \ ≤ \ x \ < \ 8
x is between 3 and 8.
Choice C represent this inequality.

2- Choice D is correct

A linear equation is a relationship between two variables, x and y, and can be written in the form of y= m \ x \ + \ 𝑏.
A non-proportional linear relationship takes on the form y= m \ x \ + \ 𝑏, where b ≠ 0 and its graph is a line that does not cross through the origin.

3- Choice C is correct

The correct answer is 576 cm
Write the proportion and solve for missing side.
\frac{Smaller \ triangle \ height}{Smaller \ triangle \ base }= \frac{Bigger \ triangle \ height}{Bigger \ triangle \ base}⇒
\frac{100 \ cm}{162 \ cm} = \frac{100 \ + \ 250 \ cm}{x }⇒ x=576 cm

4- Choice C is correct

The correct answer is - \ 7, - \ \frac{1}{2}
x{1,2} = \frac{− \ b \ ± \ \sqrt{b^2 \ − \ 4 \ a \ c}}{ 2a}
a \ x^2 \ + \ b \ x + \ c = 0
2 \ x^2 \ + \ 15 \ x \ + \ 7 = 0 ⇒ then:
a = 2, b = 15 and c = 7
x = \frac{− \ 15 \ + \ \sqrt{15^2 \ − \ 4 \ . \ 2 \ . \ 7}}{ 2 \ . \ 2 }== \frac{− \ 15 \ + \ 13}{ 4 }= \frac{− \ 2}{4}= - \ \frac{1}{2}
x =\frac{ − \ 15 \ − \ \sqrt{15^2 \ − \ 4 \ . \ 2 \ . \ 7}}{ 2 \ . \ 2}=\frac{ − \ 15 \ − \ 13}{4}=\frac{ − \ 28}{4}= – \ 7

5- Choice A is correct

The correct answer is 2
|1 \ – \ (12 \ ÷ \ | 1 \ - \ 5 |) | =|1 \ – \ (12 \ ÷ \ | - \ 4 |) | =|1 \ – \ (12 \ ÷ \ 4) | = |1 \ – \ 3 | = | – \ 2 | = 2

6- Choice A is correct

The correct answer is 350
The ratio of boy to girls is 7:4.
Therefore, there are 7 boys out of 4 students.
To find the answer, first divide the total number of students by 11, then multiply the result by 7.
550 \ ÷ \ 11 = 50 ⇒ 50 \ × \ 7 = 350

7- Choice B is correct

Translated 5 units down and 4 units to the left means: (x.y) ⇒ (x \ − \ 4, y \ − \ 5)

8- Choice A is correct

The correct answer is 7.685 \ × \ 10^{–7}
0.0000007685 = \frac{7.685}{10000000 }⇒7.685 \ × \ 10^{–7}

9- Choice D is correct

The correct answer is x^2 \ - \ 6 \ x \ - \ 27
Use FOIL (First, Out, In, Last) method.
(x \ - \ 9) \ (x \ + \ 3) = x^2 \ + \ 3 \ x \ - \ 9 \ x \ - \ 27 =x^2 \ - \ 6 \ x \ - \ 27

10- Choice B is correct

The correct answer is \frac{7}{48}
\frac{2}{25} = 0.08 and 25\% = 0.25 therefore x should be between 0.08 and 0.25
Choice B, \frac{7}{48} = 0.145 is between 0.08 and 0.25

11- Choice C is correct

The correct answr is s \ \sqrt{15}
Use Pythagorean theorem: a^2 \ + \ b^2 = c^2→
s^2 \ + \ ℎ^2=(4 \ s)^2→
s^2 \ + \ ℎ^2=16 \ s^2
Subtracting s^2 from both sides gives: ℎ^2=15 \ s^2
Square roots of both sides:
ℎ=\sqrt{15 \ s^2}=\sqrt{s^2} \times \sqrt{15}  =s \ \sqrt{15}

12- Choice A is correct

The area of the trapezoid is 40 \ + \ 4 \ \sqrt{ 10 }
Area =\frac{1}{2} \ ℎ \ (𝑏1 \ + \ 𝑏2)=\frac{1}{2} \ (x) \ (16 \ + \ 12)=168 →
14 \ x=168→x=12
y=\sqrt{4^2 \ + \ 12^2}=\sqrt{16 \ + \ 144}=\sqrt{160}=\sqrt{16 \times 10 } =4 \ \sqrt{ 10 }
The perimeter of the trapezoid is:
12 \ + \ 16 \ + \ 12 \ + \ 4 \ \sqrt{ 10 } =40 \ + \ 4 \ \sqrt{ 10 }

13- Choice C is correct

The correct answer is 9,860 sq. ft.
Area = w × h
Area = 145 \ × \ 68 = 9,860 sq. ft.

14- Choice A is correct

The correct answer is 6
Emily = Daniel
Emily = 3 Claire
Daniel = 12 \ + Claire
Emily = Daniel Emily = 12 \ + Claire
Emily = 3 Claire → 3 Claire = 12 \ + Claire
3 Claire Claire = 12
2 Claire = 12
Claire = 6

15- Choice D is correct

The correct answer is 465
93 \ ÷ \ \frac{1}{5} = \frac{\frac{93}{1}}{\frac{1}{5}} = 93 \ × \ 5=465

16- Choice D is correct

The correct answer is - \ 3
3 \ – \ 12 \ ÷ \ (5^2 \ ÷ \ 5) =
3 \ – \ 12 \ ÷ \ (25 \ ÷ \ 5) =
3 \ – \ 12 \ ÷ \ (3) = - \ 9 \ ÷ \ 3= - \ 3

17- Choice B is correct

The correct answer is 2 \ \frac{1}{10} Miles
\frac{1}{2} of the distance is 4 \ \frac{1}{5} miles.
Then: \frac{1}{2} \ × \ 4 \ \frac{1}{5}=\frac{1}{2} \ × \ \frac{21}{5}=\frac{21}{10}
Converting \frac{21}{10} to a mixed number gives:
\frac{21}{10}=2 \ \frac{1}{10}

18- Choice A is correct

The correct answer is 0.25
\frac{5}{32}=0.25

19- Choice D is correct

The correct answer is \frac{7}{15}
Let x be the number of purple marbles.
Let’s review the choices provided:
A. \frac{1}{10}
if the probability of choosing a purple marble is one out of ten, then:
Probability =\frac{number \ of \ desired \ outcomes}{number \ of \ total \ outcomes}=\frac{x}{30 \ + \ 20 \ + \ 40 \ + \ x}=\frac{1}{10}
Use cross multiplication and solve for x.
10 \ x=90 \ + \ x→9 \ x=90→x=9
Since, number of purple marbles can be 9, then, choice be the probability of randomly selecting a purple marble from the bag.
Use same method for other choices.
B. \frac{1}{4}
\frac{x}{20 \ + \ 30 \ + \ 40 \ + \ x}=\frac{1}{4}→4 \ x=90 \ + \ x→3 \ x=90→x=30
C. \frac{2}{5}
\frac{x}{20 \ + \ 30 \ + \ 40 \ + \ x}=\frac{2}{5}→5 \ x=180 \ + \ 2 \ x→3 \ x=180→x=60
D. \frac{7}{15}
\frac{x}{20 \ + \ 30 \ + \ 40 \ + \ x}=\frac{7}{15}→15 \ x=630 \ + \ 7 \ x→8 \ x=630→x=78.75
Number of purple marbles cannot be a decimal.

20- Choice C is correct

The correct answer is 0
(3.2 \ + \ 3.6 \ + \ 3.8) \ x = x
10.6 \ x = x
Then x = 0

21- Choice B is correct

The correct answer is \frac{1}{4}
For sum of 6: \ (1 & 5) and (5 & 1), \ (2 & 4) and (4 & 2), \ (3 & 3), therefore we have 5 options.
For sum of 9: \ (3 & 6) and (6 & 3), \ (4 & 5) and (5 & 4), we have 4 options.
To get a sum of 6 or 9 for two dice: 5 \ + \ 4 = 9
Since, we have 6 \ × \ 6 = 36 total number of options, the probability of getting a sum of 6 and 9 is 9 out of 36 or \frac{9}{36}=\frac{1}{4}.

22- Choice D is correct

The correct answer is 29 Miles
average =\frac{𝑠𝑢𝑚}{total}=\frac{25 \ + \ 40 \ + \ 22}{3}=\frac{87}{3}=29 Miles

23- Choice C is correct

The correct answer is 10 \ 𝜋
The distance of A to B on the coordinate plane is:
\sqrt{(x_{1} \ − \ x_{2})^2 \ + \ (y_{1} \ − \ y_{2} )^2}= \sqrt{(12 \ − \ 4)^2 \ + \ (8 \ − \ 2)^2}=\sqrt{8^2 \ + \ 6^2} =\sqrt{64 \ + \ 36}=\sqrt{100} = 10
The diameter of the circle is 10 and the radius of the circle is 5.
Then: the circumference of the circle is:
2 \ \pi \ 𝑟=2 \ \pi (5)=10 \ 𝜋

24- Choice C is correct

The correct answer is 966.4
48.32 \ ÷ \ 0.05 =966.4

25- Choice D is correct

The correct answer is ± \ 2
4 \ x^2 \ + \ 8 = 24
4 \ x^2 = 16
x^2 = 4
x =± \ 2

26- Choice A is correct

The correct answer is $ 113.28
25\% of x = 28.32
\frac{25}{100 } \ x =28.32
x = \frac{100 \ × \ 28.32}{25} = 113.28

27- Choice A is correct

The correct answer is 5
\frac{x \ + \ 10 \ + \ 12 \ + \ 15 \ + \ 8}{5} = 10 →
x \ + \ 45 = 50 →
x = 50 \ – \ 45 = 5

28- Choice A is correct

The correct answer is 254.34 in^2
Diameter = 18
then: Radius = 9
Area of a circle = π \ r^2 ⇒
A = 3.14 \ (9)^2 = 254.34 in^2

29- Choice C is correct

The correct answer is 55
\frac{240}{6 } \ < \ x \ < \ \frac{390}{6}
40 \ < \ x \ < \ 65
Then:
Only choice C is correct

30- Choice A is correct

The correct answer is \frac{ - \ 6 \ x \ - \ 20}{6 \ x^2 \ - \ 9}
Simplify:
\frac{\frac{1}{3} \ - \ \frac{x \ + \ 4}{2}}{\frac{x^2}{2} \ - \ \frac{3}{4}} = \frac{\frac{1}{3} \ - \ \frac{x \ + \ 4}{2}}{\frac{2 \ x^2 \ - \ 3}{4}} = \frac{4 \ (\frac{1}{3} \ - \ \frac{x \ + \ 4}{2})}{2 \ x^2 \ - \ 3}⇒
Simplify: \frac{1}{3} \ - \ \frac{x \ + \ 4}{2}= \frac{2 \ - \ 3 \ (x \ + \ 4)}{6}= \frac{2 \ - \ 3 \ x \ - \ 12}{6}= \frac{ - \ 3 \ x \ - \ 10}{6}
Then:
\frac{4 \ (\frac{- \ 3 \ x \ - \ 10}{6})}{2 \ x^2 \ - \ 3} =\frac{2 \ (\frac{- \ 3 \ x \ - \ 10}{3})}{2 \ x^2 \ - \ 3} =\frac{ \frac{- \ 6 \ x \ - \ 20}{3}}{2 \ x^2 \ - \ 3} =\frac{- \ 6 \ x \ - \ 20}{3\ (2 \ x^2 \ - \ 3)}=\frac{ - \ 6 \ x \ - \ 20}{6 \ x^2 \ - \ 9}

31- Choice B is correct

The correct answer is 8 square feet
Formula of triangle area = \frac{1}{2} (base × height)
Since the angles are 45-45-90, then this is an isosceles triangle, meaning that the base and height of the triangle are equal.
Triangle area = \frac{1}{2} (base × height) = \frac{1}{2} \  (4 × 4) = 8

32- Choice B is correct

The correct answer is 40
\frac{5}{25}= \frac{x}{200} → x = \frac{5 \ × \ 200}{25} = 40

33- Choice C is correct

The correct answer is 2 \ (4 \ H \ - \ 2) = 25

34- Choice D is correct

The correct answer is 952,691
The difference of the file added, and the file deleted is:
552,129 \ – \ 439,566 = 112,563
840,128 \ + \ 112,563 = 952,691

35- Choice B is correct

The correct answer is 3,840
x^{\frac{1}{2}} equals to the root of x. Then: 5 \ + \ x^{\frac{1}{2}}=20→4 \ + \ \sqrt{x}=20→\sqrt{x}=16→x=256
x=256 and 15 \ × \ x equals: 15 \ × \ 256=3,840

36- Choice A is correct

The correct answer is 1,728 cm^3
If the length of the box is 36, then the width of the box is one third of it, 12, and the height of the box is 4 (one third of the width).
The volume of the box is:
𝑉 = 𝑙𝑤ℎ = (36) \ (12) \ (4) = 1,728

37- Choice B is correct

The correct answer is (7, − \ 9)
When a point is reflected over x axes, the (y) coordinate of that point changes to (− \ y) while its x coordinate remains the same.
C (7, 9) → C’ (7, − \ 9)

38- Choice A is correct

The correct answer is 3 days 7 hours 7 minutes
7 days 21 hours 21 minutes – \ 4 days 14 hours 14 minutes = 3 days 7 hours 7 minutes

39- Choice D is correct

The correct answer is 3 sq decreased
The area of the square is 36 square inches.
Area of square = side × side =6 \ × \ 6=36
The length of the square is increased by 5 inches and its width decreased by 3 inches.
Then, its area equals:
Area of rectangle = width × length =11 \ × \ 3=33
The area of the square will be decreased by 3 square inches.
36 \ − \ 33=3

40- Choice A is correct

The correct answer is 100 cm^2
The area of the circle is 25 \ π cm^2, then, its diameter is 10 cm.
Area of circle =\pi \ r^2=12 \ π→𝑟^2=25→r=5
Radius of the circle is 5 and diameter is twice of it, 10.
One side of the square equals to the diameter of the circle. Then:
Area of square = side × side =10 \ × \ 10=100

41- Choice C is correct

The correct answer is - \ 2 \ x^2 \ y^3 \ + \ 5 \ x^3 \ y^5
6 \ x^2 \ y^3 \ + \ 2 \ x^3 \ y^5 \ – \ (8 \ x^2 \ y^3 \ – \ 3 \ x^3 \ y^5) =
6 \ x^2 \ y^3 \ + \ 2 \ x^3 \ y^5 \ – \ 8 \ x^2 \ y^3 \ + \ 3 \ x^3 \ y^5 =
- \ 2 \ x^2 \ y^3 \ + \ 5 \ x^3 \ y^5

42- Choice C is correct

The correct answer is 131.95
45\% of 91 = 40.95
91 \ + \ 40.95= 131.95

43- Choice A is correct

The correct answer is 70
Number of squares equal to: \frac{35 \ ×\ 18}{3 \ × \ 3}=35 \ × \ 2=70

44- Choice B is correct

The correct answer is 4 \ 𝜋
Let P be circumference of circle A, then; 2 \ \pi \ r_{A} = 12 \ 𝜋→r_{𝐴}=6
r_{𝐴}=3 \ r_{B}→r_{B}=\frac{6}{3}=2→
Area of circle B is; 𝜋 \ r_{B}^2=4 \ 𝜋

45- Choice D is correct

The correct answer is \left\{(6, 1), (3, 1), (0, 5), (4, 5)\right\}
A set of ordered pairs represents y as a function of x if: x_{1}=x_{2}→y_{1}=y_{2}
In choice A: (3, - \ 2) and (3, 7) are ordered pairs with same x and different y, therefore y isn’t a function of x.
In choice B: (4, 2) and (4, 7) are ordered pairs with same x and different y, therefore y isn’t a function of x.
In choice C: (5, 7) and (5, 18) are ordered pairs with same x and different y, therefore y isn’t a function of x.

46- Choice A is correct

The correct answer is $500
David’s weekly salary is $350 plus 10\% of $1500.
Then: 10\% of 1,500=0.1 \ × \ 1,500=150
350 \ + \ 150=500

47- Choice B is correct

The correct answer is 40
Write a proportion and solve. \frac{4}{5}=\frac{x}{50}
Use cross multiplication: 5 \ x=200→x=40

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