Page 190 - Algebra 1

9. Analyze The measures of the angles in the two triangles can be found (26) usingtheequationsx+x+90=180and3y+y+90=180.
Which triangle will contain the smallest angle?
x
Triangle A Triangle B
y
x 3y
*10. Error Analysis Two students are making a bar graph of test scores ranging from
(27)
11. Analyze The expression xy3 has a positive value. What must be true of the value (16) of x if y is negative?
*12. What should you watch for when analyzing a circle graph? (27)
13. Round √ 26 to the nearest integer. (13)
*14. Geometry A triangle and a rectangle have the same area. Use the diagrams to find (28) the area.
85 through 100. They want to emphasize the difference in the range of scores. Which student is correct? Explain the error.
Student A
Use a vertical scale from 75 to 100 in increments of 5.
Student B
Use a vertical scale from 0 through 100 in increments of 10.
10
2x - 4
5
x+2
*15. Multi-Step A gym charges for attending exercise classes. Raquel pays $10 to attend (28) each class because she is a non-member. Since Viola is a member, she pays $15 per
month for a membership fee, but only $5 for each class.
a. Write an expression to show how much it cost Raquel per month for c exercise
classes.
b. Write an expression to show how much it cost Viola per month for membership
and c exercise classes.
c. Set the two expressions equal to each other. Solve this equation to determine how
many classes they would each have to attend to have the same cost.
16. Verify Is x = 11 a solution for 6x + 8 = 74? Explain. If false, provide a correct
(23) solution and check.
17. Choose an appropriate graph to display the average grade received by students (22) on a science test. Explain your choice.
Lesson 29 175