Verify that each equation is an identity.
- 
= 4 cot t csc t
What will be an ideal response?
- 
= 
= 
= 
= 
? 
= 4 cot t csc t
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Factor the perfect square trinomial.9x2 + 30x + 25
A. (3x + 5)2 B. (3x - 5)2 C. (3x - 6)2 D. (3x + 5)(3x - 5)
Solve the inequality.x2 + 7x ? -3x - 21
A. -3 ? x ? -7
B. x ? -3 or x ? -7
C. 3 ? x ? 7
D. x ? - 
or x ? 
Find the value of the missing coordinate that makes the ordered pair a solution to the equation.y = -x + 1(-1, y)
A. (-1, 2) B. (-1, -3) C. (-1, -2) D. (-1, 3)
Solve the problem.Police use the formula s = 
to estimate the speed s of a car in miles per hour, where d is the distance in feet that the car skidded and f is the coefficient of friction. If the coefficient of friction on a certain dry road is 0.85 and a car was traveling on it at a rate of 
how far will the car skid? (Round to the nearest foot.)
A. 39 ft B. 120 ft C. 918 ft D. 141 ft