Which method should be used to solve the system? Explain your answer, including a description of the first step.5x2 + 3y2 =364x2 - 7y2 =100
What will be an ideal response?
Elimination should be used since the equations have the same types of terms (x2, y2, constant), while substitution would require fractions or extra steps. The first step is to multiply the first equation by 4, -4, -7, or 7 or to multiply the second equation by 5, -5, 3, or -3.
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Find the angle between u and v in radians.u = 2i + 10j + 8k, v = 10i + 4j + 3k
A. 1.28 B. 1.51 C. 0.62 D. 0.95
Provide an appropriate response.Solve the proportion: 
= 
A. 10 B. 0.22 C. 4.5 D. 18
Provide an appropriate response.Derive the identity:cos (? + ?) + cos (? - ?) = 2 cos ? cos ?
What will be an ideal response?
Use the product, quotient, and power rules of logarithms to rewrite the expression as a single logarithm. Assume that all variables represent positive real numbers.6log x + 4log y
A. log(24xy) B. log(6x + 4y) C. log (x6y4) D. log(x6 + y4)