Identify the equation as either an identity or not.1 + sec2x sin2x = sec2x
A. Not an identity
B. Identity
Answer: B
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Use your calculator to solve the problem.The length of a hypotenuse c of a right triangle with legs a and b of lengths a = 79mm and b = 42mm is given by c = . Calculate the length of the hypotenuse. (Round to an appropriate number of significant digits.)
A. 121mm B. 67mm C. 89.47mm D. 89mm
Solve the equation.10y = 3y + 8 + 6y
A. 80 B. -80 C. -8 D. 8
Solve using the elimination method. Use a graphing calculator to check your answer. x - 4y = -22 6x - 5y = 1
A. (5, 8) B. (-6, 8) C. (6, 7) D. No solution
Solve the problem.The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test. By using linear regression, the following equation is obtained: where x is number of hours studied and y is score on the test. Use this equation to predict the score on the test of a student who studies 12 hours.
A. 85.3 B. 80.1 C. 75.1 D. 85.1