Factor the polynomial using a common factor with a negative coefficient.-r3 + 4r2 - 21r
A. -r(r2 - 4r - 21)
B. -r(r2 - 4r + 21)
C. -r(r2 + 4r + 21)
D. -r(r2 + 4r - 21)
Answer: B
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Choose the equivalent expression for the given expression.tan2x
A. sec2x - 1 B. 1 + csc2x C. 1 + sec2x D. csc2x - 1
Identify the abuse of statistics.An airline company advertises that 100% of their flights are on time after checking 5 randomly selected flights and finding that these 5 were on time.
What will be an ideal response?
Solve.An electrical circuit contains two resistors connected in parallel. If the resistance of each is R1 and R2 ohms, respectively, then their combined resistance R is given the formula R = 
If their combined resistance R is 2 ohms and R2 is 10 ohms, find R1.
A. 
ohms
B. 
ohms
C. 
ohm
D. 8 ohms
Solve the equation.
- 
= 
A. m = -10 B. m = -9 C. m = -6 D. m = -5