Simplify. Write your answer with positive exponents only.  

A.
B.
C.
D. 8- 24y2


Answer: A

Mathematics

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Write an algebraic expression to answer the question and simplify.What is the sum of 4 consecutive integers if the first integer is x?

A. 4x + x; 5x B. x + x + x + x; 4x C. x + (x + 1) + (x + 2) + (x + 3); 4x + 6 D. Cannot be solved

Mathematics

Solve.The weight of a body above the surface of the earth is inversely proportional to the square of its distance from the center of the earth. What is the effect on the weight when the distance is multiplied by 2?

A. The weight is multiplied by 2. B. The weight is divided by 4. C. The weight is multiplied by 4. D. The weight is divided by 2.

Mathematics

Solve the problem.Suppose that certain bacteria can double their size and divide every 30 minutes. Write a recursive sequence that describes this growth where each value of n represents a 30-minute interval. Let a1 = 424 represent the initial number of bacteria present.

A. a1 = 424; an = 2 an-1  for n > 1.
B. an = 2 a1  for all values of n.
C. a1 = 424; an =  an-1  for n > 1.
D. a1 = 424; an = 2 an+1  for n > 1.

Mathematics

Solve the problem.Jay drove 390 kilometers at the average rate of 78 kilometers per hour. How long did the trip take?

A. 4 hr 
B.  hr
C. 5 hr 
D. 6 hr 

Mathematics