Math Writing Questions 5

Question 1

A runner completes a race in t minutes. A second runner finishes 8 minutes faster. Which expression gives the second runner's time?

Accepted Answer

t - 8

Answer

t + 8

Answer

8t

Answer

t/8

Question 2

Which equation represents 'half of a number increased by 9 is 21'?

Accepted Answer

n/2 + 9 = 21

Answer

n/2 - 9 = 21

Answer

(n + 9)/2 = 21

Answer

2n + 9 = 21

Question 3

A vendor sells apples for $0.50 each and oranges for $0.75 each. Which expression gives the total cost for a apples and g oranges?

Accepted Answer

0.50a + 0.75g

Answer

0.75a + 0.50g

Answer

(0.50 + 0.75)(a + g)

Answer

1.25(a + g)

Question 4

Which inequality represents 'the product of 3 and a number x is no less than 15'?

Accepted Answer

3x ≥ 15

Answer

3x ≤ 15

Answer

3x > 15

Answer

3x < 15

Question 5

A pool is being filled at 8 gallons per minute and simultaneously drained at 3 gallons per minute. Which expression gives the net gallons after m minutes?

Accepted Answer

5m

Answer

11m

Answer

8m

Answer

3m

Question 6

Which expression represents 'the square of the sum of x and 4'?

Accepted Answer

(x + 4)²

Answer

x² + 4

Answer

x² + 16

Answer

x + 4²

Question 7

A phone plan costs $40 per month plus $0.10 per text message. If a user sends t texts and has a $55 budget, which inequality must hold?

Accepted Answer

40 + 0.10t ≤ 55

Answer

40 + 0.10t ≥ 55

Answer

0.10t ≤ 55

Answer

40t + 0.10 ≤ 55