Use the quadratic formula to solve the quadratic equation. Approximate the solutions to the nearest tenth.3x2 = 39
A. -7.2, 7.2
B. -1.8, 1.8
C. -3.6, 3.6
D. -4.4, 4.4
Answer: C
Mathematics
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. y = x2 + 4, y = 2x + 4
A. 
?
B. 
?
C. 8?
D. 
?
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Find all square roots of the number.81
A. ±9 B. ±10 C. ±18 D. ±11
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Simplify.2.7 ? 17.6 + 12.1 ? 19.1
A. 1138.7 B. 671.5 C. 1531.6 D. 278.63
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Solve the problem. Round to the nearest tenth if necessary.Sales of frozen pizza for a club fund-raiser increased from 500 one year to 530 the next year. What was the percent of increase?
A. 94% B. 6% C. 5.7% D. 94.3%
Mathematics