Find the exact value of the expression.cos 
cos 
+ sin 
sin 
A. 
B. 
C. 
D. 1
Answer: B
Mathematics
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Rewrite the expression using the indicated property of real numbers.Commutative property of addition:
7 + 4
A. (4)(7) B. 4 + 7 C. 7 + 4 D. (7)(4)
Mathematics
Provide an appropriate response.Use the FOIL method to show that (2x + 4)(x - 5) is 2x2 - 6x - 20. If you were asked to completely factor 2x2 - 6x - 20, why would it be incorrect to give (2x + 4)(x - 5) as your answer?
What will be an ideal response?
Mathematics
Solve the problem.Write the perimeter of the following rectangle as an algebraic expression and then simplify. L = 8x3, W = 4x2
A. P = 8x3 + 4x2 B. P = 16x3 + 8x2 C. P =16x2 + 8x3 D. P = 8x2 + 4x3
Mathematics
Add and simplify. Write the answer as a mixed number as needed.7
+ 17
A. 25
B. 7
C. 23
D. 24
Mathematics