Solve.Doris has a rectangular fish pond 7 by 10 feet. She wants to put grass in a strip of uniform width around the pond. She has enough grass seed for 138 square feet. How wide will the strip be?
A. 5.5 ft
B. 4 ft
C. 3 ft
D. 5 ft
Answer: C
Mathematics
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The letters r and ? represent polar coordinates. Write the equation using rectangular coordinates (x, y).r(1 - 2 cos ?) = 1
A. 
= 2 + x
B. 
= 1 + 2x
C. x2 + y2 = 2 + x
D. x2 + y2 = 1 + 2x
Mathematics
Simplify.-12 + 14 - (-11) - 8
A. 21 B. -29 C. -1 D. 5
Mathematics
Simplify. Assume that all variables represent positive real numbers.(3
+ 9)(7
- 5)
A. 18 + 78
B. 108 + 48
C. 18 + 48
D. 66
Mathematics
Find (f ?g)(x) for the given functions f(x) and g(x).f(x) = 5x + 7 and g(x) = -6x + 2
A. 30x + 17 B. -30x + 44 C. -30x D. -30x + 17
Mathematics