Simplify the expression by combining like terms.8y2 + 13y2

A. 21y
B. y2
C. 21y2
D. 21y4

Answer: C

Mathematics

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Find the exact value of the expression.sin 260° cos 20° - cos 260° sin 20°

A. - 
B. - 
C.
D. - 

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Mathematics

Find the coordinates of the vertex and the intercepts of the quadratic function. When necessary, approximate the x-intercepts to the nearest tenth.g(x) = 6x2 + 60x + 114

A. V(-5, -36); I(0, 114); (-7.4, 0); (-2.6, 0) B. V(60, 114); I(0, -114); (-10, 0); (10, 0) C. V(5, -36); I(0, -114); (-11, 0); (1, 0) D. V(-30,-36); I(0, 114); (2.6, 0); (7.4, 0)

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Mathematics

Determine whether the expression represents a number that is positive, negative, or zero.(-

A. Positive B. Negative C. Zero

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Mathematics

Simplify. Combine like terms if possible.-9x - 3y

A. Not like terms B. -12xy C. -12(x + y) D. -5xy

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Mathematics