Factor completely. If the polynomial is prime, state this.x4 - 16
A. (x2 + 4)(x - 2)(x + 2)
B. (x + 2)2(x - 2)2
C. (x2 + 4)(x2 - 4)
D. (x2 - 4)(x - 2)(x + 2)
Answer: A
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Solve the problem by writing an appropriate system of equations and using the inverse of the coefficient matrix to solve the system.A grain dealer sold to one customer 5 bushels of wheat, 2 of corn, and 3 of rye, for $39.60; to another, 2 of wheat, 3 of corn, and 5 of rye, for $34.80; and to a third, 3 of wheat, 5 of corn, and 2 of rye, for $33.60. Which of the grains was the cheapest?
A. Wheat B. Wheat and rye (tie) C. Corn and rye (tie) D. Corn
Find the values of x for which the equation is true.
- 4 = 8
A. 4, -4 B. 12 C. -12 D. 12, -12
Solve.Jim can run 5 miles per hour on level ground on a still day. One windy day, he runs 10 miles with the wind, and in the same amount of time runs 7 miles against the wind. What is the rate of the wind?
A. 
mph
B. 1
mph
C. 5 mph
D. 28
mph
Add or subtract as indicated. Write the answer in simplest form.
- 
A. 
B. - 
C. 
D. 