i-Ready Diagnostic Test Math Concepts and Applications 5

Question 1

A jacket originally costs $80 and is on sale for 25% off. What is the sale price?

Accepted Answer

$60

Answer

25% of $80 = $20; $80 − $20 = $60.

Question 2

What is the perimeter of a regular hexagon with a side length of 9 cm?

Accepted Answer

54 cm

Answer

A regular hexagon has 6 equal sides: 6 × 9 = 54 cm.

Question 3

If y = 3x − 2, what is y when x = 5?

Accepted Answer

13

Answer

y = 3(5) − 2 = 15 − 2 = 13.

Question 4

A number is increased by 40% and then decreased by 40%. Compared to the original, the result is:

Accepted Answer

16% less than the original

Answer

1 × 1.4 × 0.6 = 0.84, which is 16% less than the original.

Question 5

A line passes through points (0, 2) and (4, 10). What is its slope?

Accepted Answer

2

Answer

Slope = (10 − 2) ÷ (4 − 0) = 8 ÷ 4 = 2.

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