Use cross products to determine whether the pair of fractions is equivalent.
and 
A. equivalent
B. not equivalent
Answer: B
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Simplify the given expression by giving the results in terms of one-half the given angle. Then use a calculator to verify the result.
A. 0.809 B. -0.5878 C. 0.891 D. 0.454
Find the x-intercepts for the parabola whose equation is given. If the x-intercepts are irrational, round your answers to the nearest tenth.y = -x2 + 9x - 20
A. x-intercepts (4, 0) and (5, 0) B. x-intercepts (4, 0) and (-5, 0) C. x-intercepts (-4, 0) and (-5, 0) D. No x-intercepts
Determine the greatest common factor for the group of terms.7(a + 3)2 and 21(a + 3)4
A. 147(a + 3)4 B. 21(a + 3)4 C. 7(a + 3)2 D. 21(a + 3)2
Assume that a sample of bivariate data yields the correlation coefficient, r, indicated. Use the critical values table for the specified sample size and level of significance to determine whether a linear correlation exists.r = -0.923 when n = 6 at ? = 0.05
A. No B. Yes