Use a calculator to find the approximate value of the expression. Round the answer to two decimal places.cos 7°
A. 0.99
B. -0.75
C. 0.75
D. -0.99
Answer: A
Mathematics
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Collect like terms.-8a + 2.2 - 0.2c - 8a + 3 - 8c + 16a
A. -32a - 8.2c + 5.2 B. -6c + 3 C. -8.2c + 5.2 D. -16a + 7.8c + 5.2
Mathematics
Find values of x and y, if any, that will make the matrices equal.
?
?
A. 
, 
B. 
, 
C. 
, 
D. 
, 
E. no solution
Mathematics
Solve the problem.The period, P, of a pendulum in seconds is given by the formula 
where L is the length of the pendulum. Find P when the value of L is 7 inches. Round your answer to the nearest hundredth. Use 3.14 for ?.
A. 2.47 seconds B. 2.94 seconds C. 1.47 seconds D. 3.94 seconds
Mathematics
Solve using Cramer's rule.-2x + 3y = 10 4x + 5y = 68
A. (-8, 7) B. (-7, -8) C. (7, 8) D. (8, 7)
Mathematics