Use order of operations to simplify the expression.21 - (10 + 20)

A. 51
B. 31
C. -9
D. 11

Answer: C

Mathematics

Find the equation of the parabola satisfying the given conditions. The vertex is at the origin.Axis y = 0, passes through (2, 8)

A. y² = 32x
B. x² = 32y
C. y² = 4x
D. x² = y

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Mathematics

Find the square root. Approximate if necessary.57

A. between 7 and 8 B. 7 C. between 6 and 7 D. 8

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Mathematics

Graph the function.f(x) =

A.

B.

C.

D.

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Mathematics

Calculate.7 ? 42 + 1 ? 7 - 2( 2 + 3)

A. 118 B. 781 C. 109 D. 25

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Mathematics