Page 200 - Algebra 1

11. Error Analysis Two students solved 2x - y = 6 for y. Which student is correct? (29) Explain the error.
12. Geometry What is the area of the shaded part of the rectangle? (29)
Student A
2x - y = 6
2x = y + 6
2x - 6 = y
Student B
2x - y = 6
2x = y + 6
2x + 6 = y
*13. Multi-Step (29)
Solve
3x - 4 6
4
_x + _y = 2 for y. Find y when x = 3. 23
x
*14. Consumer Math Joel deposited money in an account that has a certain annual (29) interest rate. Using the formula i = prt, or interest = principal · rate · time,
how could he compute for the rate if the numeric value of the other items was given?
15. Simplify . (11) -7 - 2(-3)
3 + 7(-3) __
16. Error Analysis Two students solved the same multi-step equation. Which student (28) is correct? Explain the error.
Student A
2x - 4(3x + 6) = -6(2x + 1) - 4 2x - 12x + 6 = -12x + 1 - 4 -10x + 6 = -12x - 3
2x = -9
x = - 4 _1 2
Student B
2x - 4(3x + 6) = -6(2x + 1) - 4 2x - 12x - 24 = -12x - 6 - 4
-10x - 24 = -12x - 10 2x = 14
x=7
Measurement On a map, 1 centimeter represents 50 kilometers. The actual distance the map.
3 4 17.
(21) between two cities is 675 kilometers. Find the distance between the two cities on
*18. Multiple Choice What would make the graph of basketball scores less (27) misleading?
A Using a broken scale on the horizontal axis B Using a broken scale on the vertical axis
C Using larger intervals
D Using smaller intervals
Basketball Scores
0
1 2 3 4 5
150
75
Lesson 30 185