Simplify the expression. Assume that all variables are positive when they appear.7
- 2
A. 2
B. 30
C. -30
D. -2
Answer: D
Mathematics
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Find the exact value of the expression.sin 260° cos 20° - cos 260° sin 20°
A. - 
B. - 
C. 
D. - 
Mathematics
Write a quadratic equation in the form ax2 + bx + c = 0 that has the given numbers as solutions.-2, 9
A. x2 - 18x + 7 = 0 B. x2 + 7x - 18 = 0 C. x2 - 7x - 18 = 0 D. x2 - 18x - 7 = 0
Mathematics
How many subsets of the set {3, 4, 6, 8, 9} do not contain a perfect square?
Fill in the blank(s) with the appropriate word(s).
Mathematics
Provide an appropriate response.Find dy/dt when x = 5 if y = 2x2 - 6x + 7 and dx/dt = 1/2.
Fill in the blank(s) with the appropriate word(s).
Mathematics