Factor.r2+ 4r + 4
A. (r + 2)2
B. (r - 2)2
C. (r + 2)(r + 2)
D. (r + 4)(r - 4)
Answer: A
Mathematics
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Add or subtract. Then simplify by collecting like radical terms, if possible. Assume that no radicands were formed by raising negative numbers to even powers.7
- 5
A. 18
B. 2
C. -18
D. cannot simplify
Mathematics
Multiply.(-7x5)(5x3)
A. -35x8 B. 12x8 C. -35x15 D. 12x15
Mathematics
Find the surface area of the geometric solid. If needed, use 3.14 as an approximation for ? and round the answer to the nearest tenth.Sphere: r = 5 mi
A. 104.7 mi2 B. 314 mi2 C. 523.3 mi2 D. 78.5 mi2
Mathematics
Write the decimal point in the correct location. 
A. 319 B. 3190.0 C. 3.19 D. 31.90
Mathematics