Equations and Inequalities

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Bertha's solution to an inequality is shown. Which statement about Bertha's solution is true?

• Bertha made a mistake in Step 1.

• Bertha made a mistake in Step 2.

• Bertha made a mistake in Step 4.

• Each step is correct.

To find a shoe size, the manufacturer uses the equation S = 3ƒ — 22, where S represents the shoe size and f represents the heel-to-toe length of the foot, in inches. Which of the following is the same equation solved for f in terms of S?

What is the value of x if 15 - 2(x+5) = 25?

• 10

• 15

• -15

• -10

If 9 + 2x - 5 = 10, then x =

• 7

• 3

• 4

• 12

• 2

• 4

• 6

• 8