Math Writing Questions 4

Question 1

A gym charges a $30 enrollment fee plus $25 per month. Which equation gives the total cost C after m months?

Accepted Answer

C = 25m + 30

Answer

C = 30m + 25

Answer

C = 25 + 30m

Answer

C = 55m

Question 2

Which expression represents 'the quotient of a number n and 4, increased by 7'?

Accepted Answer

n/4 + 7

Answer

n/(4 + 7)

Answer

4/n + 7

Answer

(n + 7)/4

Question 3

A population of 500 bacteria doubles every hour. Which expression gives the population P after h hours?

Accepted Answer

P = 500 · 2^h

Answer

P = 500 + 2h

Answer

P = 2 · 500h

Answer

P = 500h^2

Question 4

Which inequality represents 'a number y is more than 5 units away from zero'?

Accepted Answer

|y| > 5

Answer

|y| < 5

Answer

y > 5

Answer

y < -5

Question 5

A car travels at a constant speed of s mph. Which expression gives the distance d after t hours if it started 10 miles ahead?

Accepted Answer

d = st + 10

Answer

d = s + 10t

Answer

d = 10st

Answer

d = st - 10

Question 6

Which equation represents 'five times the difference of a number x and 3 equals 20'?

Accepted Answer

5(x - 3) = 20

Answer

5x - 3 = 20

Answer

5x + 3 = 20

Answer

(5 - 3)x = 20

Question 7

A triangle has a perimeter of 36 cm. Two sides measure x and 2x. Which equation finds x?

Accepted Answer

4x = 36

Answer

x + 2x + (36 - 3x) = 36

Answer

3x + third side = 36

Answer

x + 2x = 36