AnswersSY2025-26 - 1205040 MJ Grade 7 Mathematics Sem 1 CRUnit Test

Unit Test — Unit test Answers

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1
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After 3 years, a $1,500 investment is worth $1,680. What is the interest rate on the investment?

A
0.04 percent
B
2.0 percent
C
4.0 percent
D
37.3 percent
2
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The snack bar at the school purchases water bottles at wholesale and then marks them up to make a profit. It marks up the water bottles by percent, an amount of $0.28.PercentsTotal33%33%33%100%$0.28$0.28$0.28 What was the wholesale price of each water bottle?

Question illustration
A
$0.56
B
$0.84
C
$0.93
D
$1.12
3

Which term is a word for an initial amount of money that is borrowed or invested?

A
time
B
principal
C
interest
D
interest rate
4

The office manager of First Tech Support borrowed $25,000 to purchase new computers for employees. The bank charges 6 percent interest for 4 years. How much interest will the company pay in all?

A
$1,200
B
$1,500
C
$4,800
D
$6,000
5

Pedro predicted that he would sell 128 novels. He actually sold 150 novels. What are the values of a and b in the table below?Percent ErrorItemApproximate valueExact valueErrorAbsolute errorRatioPercent errorNovels128150 ab

A
a = Negative StartFraction 22 over 128 EndFraction; b = negative 17.2 percent
Option A
B
a = Negative StartFraction 22 over 150 EndFraction; b = negative 14.7 percent
Option B
C
a = StartFraction 22 over 150 EndFraction; b = 14.7 percent
Option C
D
a = StartFraction 22 over 128 EndFraction; b = 17.2 percent
Option D
6

Kyle wants to buy a new laptop that has an original price of $540. The store is having a sale, so the laptop is 10 percent off, which amounts to a discount of $54. If sales tax is 8 percent on the final price of the laptop, how much tax will he need to pay?

A
$38.88
B
$43.20
C
$47.52
D
$48.60
7

Renee used the values in the table to calculate simple interest. Principal$750Interest rate?Time11 yearsInterest$412.50Which interest rate is missing from Renee’s table?

A
0.05%
B
0.5%
C
5%
D
50%
8

Last year, Theodora estimated that she would sell 96 bracelets. But at the end of the year, she had 16 bracelets left over. Which explains how Theodora can find the percent error of her estimate?

A
First, find that the exact value is . The error is 16. The absolute error is 16. Set up the ratio with the absolute error: . Divide and then multiply by 100 to find the percent error: .
Option A
B
First, find that the exact value is . The error is 16. The absolute error is 16. Set up the ratio with the absolute error: . Divide and then multiply by 100 to find the percent error: .
Option B
C
First, find that the exact value is . The error is 16. The absolute error is 16. Set up the ratio with the absolute error: . Divide and then multiply by 100 to find the percent error: .
Option C
D
First, find that the exact value is . The error is 16. The absolute error is 32. Set up the ratio with the absolute error: . Divide and then multiply by 100 to find the percent error: .
Option D
9

Sales tax in Birmingham, AL, is the highest in the nation at 10 percent. Pete paid $9.44 in sales tax for an item in Birmingham, AL.PercentsTotal10%10%10%10%10%10%10%10%10%10%100%$9.44$9.44$9.44$9.44$9.44$9.44$9.44$9.44$9.44$9.44 What was the price of the item before tax was included?

A
$0.09
B
$0.94
C
$94.40
D
$103.84
10

Luca is planning to pay the restaurant bill for his coworkers. The bill was $193.75. A 4% tax was then added by the waiter. If Luca wants to leave a 16% tip on the total amount including the tax, how much should Luca pay?

A
$201.50
B
$217.50
C
$224.75
D
$233.74
11

Antoine and Tess have a disagreement over how to compute a 15% gratuity on $46.00. Tess says, “It is easy to find 10% of 46 by moving the decimal point one place to the left to get $4.60. Do that twice. Then add the two amounts to get for the 15% gratuity.”How should Antoine respond to Tess’s method?

Question illustration
A
“Tess, the best way to find 15% of $46.00 is to multiply by $46.00 to get $3.07, which is the 15% gratuity.”
Option A
B
“Tess, you found 20% of the number because you added 10% and 10%. You need to add 10% to of 10%. Add $4.60 and $2.30 to get $6.90, which is the 15% gratuity.”
Option B
C
“Tess, the best way to find 15% of $46.00 is to multiply 0.015 and 46.00 to get $0.69, which is the 15% gratuity.”
D
“Tess, you should use a table with 5% segments to find the gratuity. Each 5% segment has a value of $9.20, so that is the 15% gratuity.”
12

A frame is marked down by 22 percent from an original price of $14.50. What is the new price?

A
$3.19
B
$11.31
C
$13.72
D
$14.28
13

Paul needs to find 310% of 72. Which expression should he use?

A
(0.310) (72)
Option A
B
(3.10) (72)
Option B
C
(31.0) (72)
Option C
D
(310) (72)
Option D
14

A frozen dinner at a grocery store is purchased for $2.20 wholesale and is marked up by 40 percent. A customer wants to buy four frozen dinners. How much will the customer pay, including paying 9 percent sales tax? Round your answer to the nearest cent.

A
$8.80
B
$10.07
C
$13.43
D
$14.39
15

Bescha predicted that she would sell 500 handmade vases at a flower show. When the show was over, she had 50 vases left. What was the percent error in the estimate? Round the answer to the nearest tenth.

A
10.0%
B
11.1%
C
50.0%
D
90.1%

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