Solve the problem.The voltage E in an electrical circuit is given by E = 7.1 cos 80?t, where t is time measured in seconds. Find the frequency of the function (that is, find the number of cycles or periods completed in one second).
A. 80
B. 
C. 40
D. 
Answer: C
Mathematics
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Write the expression without parentheses.-(-9m + 7n - 6p)
A. 9m - 7n + 6p B. -9m + 7n + 6p C. 9m - 7n - 6p D. -9m + 7n - 6p
Mathematics
Tell whether the expression is a polynomial. If it is, give its degree.1 - 8x
A. Polynomial; degree 1 B. Polynomial; degree -8 C. Polynomial; degree 8 D. Not a polynomial
Mathematics
Completely factor the expression.
a. 
b. 
c. 
d. 
e. 
Mathematics
Express the following using negative exponents.
A. 4-x+1 B. 4-x C. x-4 D. x4
Mathematics