Translate the verbal phrase into a mathematical expression. Use x to represent the unknown number.8 times a number
A. 8 + x
B. 
C. 8 - x
D. 8x
Answer: D
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Use a calculator to find an approximation to the nearest ten-thousandth.ln 51
A. 18.8192 B. 0.2536 C. 3.9318 D. 1.7076
Work the application. Write a legend and an equation. Solve the equation and answer in a complete sentence.The area of a rectangular piece of plywood is 45 square inches and the width is 9 inches. Find the length.
A. Let x = the length of the rectangular piece of plywood. 9 ? x = 45 The length of the rectangular piece of plywood is 4 inches. B. Let x = the length of the rectangular piece of plywood. x ? 9 = 45 The length of the rectangular piece of plywood is 5 inches. C. Let x = the length of the rectangular piece of plywood. 45 - 9 = x The length of the rectangular piece of plywood is 36 inches. D. Let x = the length of the rectangular piece of plywood. 9 + 9 + x + x = 45 The length of the rectangular piece of plywood is 8 inches.
Factor.5c2 + 10cd + 5d2 - 20f2
A. 5(c + d + 2f)(c + d - 2f) B. 5((c + d)2 + 2f)((c + d)2 - 2f) C. ((c + d)2 + 2f)((c + d)2 - 2f) D. (c + d + 2f)(c + d - 2f)
Find the foci of the ellipse.36(x - 3)2 + 9(y + 3)2 = 324
A. (3, 3), (3, -9)
B. (3- 3
, -3), (3+ 3
, -3)
C. (-3, 3 - 3
), (-3, 3 + 3
)
D. (3, -3 - 3
), (3, -3 + 3
)