Solve the problem.Ellen wishes to mix candy worth $5.07 per pound with candy worth $6.45 per pound to form 25 pounds of a mixture worth $6.17 per pound. How many pounds of the more expensive candy should she use?
A. 20 pounds
B. 5 pounds
C. 7 pounds
D. 25 pounds
Answer: A
Mathematics
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Solve the problem.A marine biologist determines that the size, p, of a population of crabs, after t days can be modeled by the function 
Assuming that this model continues to be accurate, when will this population become extinct? (Round to the nearest day.)
A. 547 days B. 707 days C. 911 days D. 1512 days
Mathematics
Simplify the expression.6(5x - 2) - 4(x - 4)
A. 26x - 6 B. 26x + 4 C. 6x + 4 D. 26x - 28
Mathematics
Solve the equation.
+ 
= 
A. -6, 9 B. -9, 6 C. -9, -6 D. 6, 9
Mathematics
Complete the ordered pairs for the equation.4x + y = -21 (-7, ) (0, ) (1, )
A. (-7, 7) (0, 0) (1, -25) B. (-7, 7) (0, -21) (1, -25) C. (-7, -7) (0, -21) (1, -25) D. (-7, 7) (0, -35) (1, -25)
Mathematics