Factor the polynomial by grouping.32 + 45x2 - 76x
A. (9x - 8)(5x + 4)
B. (9x + 8)(-5x + 4)
C. (9x - 8)(5x - 4)
D. prime
Answer: C
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Evaluate the indicated trigonometric function of the acute angle ?.If ? is an acute angle of a right triangle and if sec ? = 
, then find the value of cot ?.
A. 
B. 
C. 
D. 
Solve the problem.Assume it costs 30 cents to mail a letter weighing one ounce or less, and then 28 cents for each additional ounce or fraction of an ounce. Write a piecewise-defined function P(x) that represents the cost, in cents, of mailing a letter weighing between 0 and 3 ounces.
A. P(x) = {
B. P(x) = {
C. P(x) = {
D. P(x) = {
Add. Write a mixed numeral for the answer.
A. 10
B. 10
C. 10
D. 10
Factor by grouping.20x6 - 25x3 - 12x3 + 15
A. (5x3 + 3)(4x3 + 5) B. (5x6 - 3)(4x - 5) C. (5x3 - 3)(4x3 - 5) D. (20x3 + 3)(x3 + 5)