Use Fundamental Identities and/or the Complementary Angle Theorem to find the exact value of the expression. Do not use a calculator.If tan2 ? = 8, find the exact value of sec2 ?.
A. 8
B. 7
C. 9
D. 16
Answer: C
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Estimate the answer by rounding as indicated.Estimate by rounding to the nearest hundred.
A. 300 B. 260 C. 1600 D. 200
Solve the problem.The value, in dollars, of a particular KX37B computer is given by 
where x is the number of years the computer has been in existence. Find the slope and y-intercept of the equation and explain what each signifies.
A. -558.25 signifies the hourly cost of repairs, and 4413 signifies the cost of software. B. -558.25 signifies the amount of depreciation per year, and 4413 signifies the initial cost. C. -558.25 signifies the number of computers owned, and 4413 signifies the cost of electricity. D. 4413 signifies the amount of depreciation per year, and -558.25 signifies the initial cost.
Divide.x10 ÷ x5
A. x5 B. x4 C. x50 D. x15
Write the sentence as an equation.The product of -4 and -15 is equal to 60.
A. 4(15) = 60
B. 
= 60
C. -4(-15) = 60
D. -4 - 15 = 60