Simplify the following by combining like terms.9x2 + 2x2 - 4x2
A. -72x2
B. 7x6
C. 7x2
D. cannot be simplified
Answer: C
Mathematics
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Solve. Write the fraction in simplest form.The outer diameter of the donut below measures 
inches. What is measure of the inner diameter of the donut?inner diameter 
A. 
? in2.
B. 
in.
C. 
in.
D. 1
in.
Mathematics
Estimate the sum or difference by first rounding to the nearest ten.84
A. 200 B. 180 C. 170 D. 177
Mathematics
Find the zeros of the polynomial function and state the multiplicity of each.f(x) = (x + 2)2(x - 1)
A. x = -2, multiplicity 1; x = 1, multiplicity 1 B. x = -2, multiplicity 1; x = 1, multiplicity 2 C. x = -2, multiplicity 2; x = 1, multiplicity 1 D. x = 2, multiplicity 2; x = 1, multiplicity 1
Mathematics
Find the missing length in the similar triangles.
A. x = 15 B. x = 10 C. x = 5 D. x = 7
Mathematics