Factor by grouping.15x2 + 20x + 6x + 8

A. (15x + 2)(x + 4)
B. (15x - 2)(x - 4)
C. (5x + 2)(3x + 4)
D. (5x - 2)(3x - 4)

Answer: C

Mathematics

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Determine the specific solutions (if any) to the equation on the interval [0, 2?).sin2 2? = 1

A. 0, , ?, 
B. , , , 
C. no solution
D. , 

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Solve the problem.A rancher in Calgary decides to build a silo inside his corral. The rectangular corral measures  by  and the silo's base is circular with a diameter of x meters. Find a polynomial for the remaining area of the corral (in square meters) after the silo is built.

A.  m2
B. (286 - ?x2) m2
C. (286 - 2?x) m2
D.  m2

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Translate the sentence into a mathematical equation. Be sure to identify the meaning of all symbols.The surface area of a sphere is 4? times the square of the radius.

A. If S represents the surface area and r the radius, then S = ?r2. B. If S represents the surface area and r the radius, then 4?S =r2. C. If S represents the surface area and r the radius, then S = 4?r2. D. If S represents the surface area and r the radius, then S = 4?r.

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Simplify using order of operations.- + 30 ÷ (7 - (-3)) - 32

A. 23 B. -29 C. -23 D. 11

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Mathematics