Math - Two-Step Equations

Tracy is saving to buy a new guitar that costs $253.77 (including tax). Tracy has saved $136.27, and she can save $23.50 each week. How many more weeks will it take her to save enough money?

5 weeks

Tracy is saving to buy a new guitar that costs $253.77 (including tax). Tracy has saved $136.27, and she can save $23.50 each week. Which equation could you use to find how long it will take to save for the guitar?

$136.27 + $23.50 w = $253.77

Dylan is going to the fair and has $35. He is going to use $5 for food. The admission is $7, and rides are $1.85 each. Which of the following equations could you use to find how many rides Dylan can go on?

$35 = $12 + $1.85 x

The first step in solving 5 1/2 = 2 2/7 + n/4 is to subtract 2 2/7 from both sides of the equation.

True

Dylan is going to the fair and has $35. He is going to use $5 for food. The admission is $7, and rides are $1.85 each. How many rides can he go on?

12

Explain the steps in solving 2.14x−12.18=−5.76 and write the solution to the equation.and write the solution to the equation.

2.14x - 12.18 = -5.76 add 12.18 on both sides 2.14x = 6.42 divide by 2.14 on both sides x=3

Forensic scientists can determine the approximate height that a male person was by measuring the length of the femur (thigh bone). They use the formula: height = 1.88f + 32.01, where f is the length of the femur in inches. To the nearest inch, how many inches long is the femur of a male who is 71 inches tall?

21 inches

1. -1.4 n + 2.1 = 6.58 2. 4 n - 2 3/4 = -22 3/4 3. 5.7 n + 4.1 = 2.96 4. n/8 + 1/2 = -3 1/2

4. n = -32 1. n = -3.2 3. n = -0.2 2. n = -5

Identify the coefficient in the term 7x2y3.

7

The first step in solving 3.17t - 2.431 = 5.06 is to divide both sides of the equation by 3.17.

False

The first step in solving 7/8 = 3x - 5/11 is to subtract from both sides of the equation.

False