Download presentation

Presentation is loading. Please wait.

1
EXAMPLE 3 Standardized Test Practice SOLUTION Write verbal models for this situation.

2
EXAMPLE 3 Standardized Test Practice Equation 1 Equation 2

3
**Standardized Test Practice**

EXAMPLE 3 Standardized Test Practice STEP 2 Write a system of equations. Equation 1 5x + 7y = 2500 Total cost for all T-shirts Equation 2 8x + 12y = 4200 Total revenue from all T-shirts sold STEP 3 Solve the system using the elimination method. Multiply Equation 1 by –8 and Equation 2 by 5 so that the coefficients of x differ only in sign. 5x + 7y = 2500 – 40x – 56y = – 20,000 40x + 60y = 21,000 8x + 12y = 4200 Add the revised equations and solve for y. 4y = 1000 y = 250

4
**Standardized Test Practice**

EXAMPLE 3 Standardized Test Practice Substitute the value of y into one of the original equations and solve for x. 5x + 7y = 2500 Write Equation 1. 5x + 7(250) = 2500 Substitute 250 for y. 5x = 2500 Simplify. x = 150 Solve for x. The school sold 150 short sleeve T-shirts and 250 long sleeve T-shirts. ANSWER The correct answer is C.

5
GUIDED PRACTICE for Example 3 4. WHAT IF? In Example 3, suppose the school spends a total of $3715 on T-shirts and sells all of them for $6160. How many of each type of T-shirt are sold? The school sold 365 short sleeve T-shirts and 270 long sleeve T-shirts. ANSWER

Similar presentations

© 2024 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google