practice test 93

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Algebra 2
Practice Quiz 93

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Solve each equation for x.

1. 6 – 2x = 7x – 12 2 -8 -2	2. 4(x – 1) = 21 – x 11/2 7 5
Answer.

3. Which is 0.000342 in scientific notation ? 3.42 x 10^-4 3.42 x 10⁴ 4 x 10^-3.42	4. Which is a solution to x² - 25 = 0 ? - 5 - 25 25 5
Solve.
5. –12 < 2x + 4 Ł 6 – 8 < x Ł 1 –12 < x Ł 6 –1 < x Ł 6	6. x – 2 Ł 5 or x + 3 ł 6 x Ł 7 or x ł - 3 x Ł - 7 or x ł 9 x Ł 7 or x ł 3
7. \| 2x + 6 \| = 12 - 9 - 3 9 3	8. \| x \| = 9 9 no solution -9

9. \| x \| = -9 - 9 no solution 9	10. \| x – 2 \| Ł 5 x Ł 7 or x ł - 3 x ł 7 or x Ł - 3 x Ł 7 or x Ł - 3
11. For V = 1/3 p r² h , which equation is correctly solved for h ? 1/3pr² - 3 / pr² 3V / pr²
Find the slope.
12. y = 3x + 5 5 3 -3	13. -3x + y = 5 5 3 -3
14. x = -9 3 0 undefined	15. T(4,0) R(5,-2) - 2 undefined 2
16. What is the slope of the line parallel to 3x + y = -7 ? - 3 undefined 3	17. What is the slope of the line perpendicular to 3x + y = -7 ? - 3 undefined 1/3
Find the equation of the line for the given information.
18. Passes thru J(4,-2) & m = 2 y = 2x - 10 y - 4 = 2(x + 2) y + 2 = 2(x - 4)	19. Passes thru A(4,0) & N(5,-2) - 2 y = -2x + 8 y -2x = 8
Answer.
20. Which is the equation that relates the variables x & y if they vary directly and x = 3 , y = 7 ? y = 7 no solution y = 7/3x	21. The members of the marching band are selling candy bars and flowers as a fund-raising project. Their goal is to make $1000 profit. They will receive $1.75 for every candy bar sold and $2.25 for each flower. Which is the correct model that shows the different number of candy bars and flowers the band members must sell to achieve their goal? 1000(1.75c + 2.25f) 1.75c + 2.25f = 1000 not enough information
22. In 1986, 14.9% of all food servers in the U.S. were men. By 1994, this percent had risen to 21.4%. What was the average rate of change in the percent of male food servers? 0.81% 81% 6.5/8	Find the values for: _{ 23. fred barney wilma 24. fred barney wilma 25. fred barney wilma

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