Fill in the blank with one of the words or phrases listed below. 
A term that is a number only is called a(n) 
.
A. solution
B. variable
C. numerical coefficient
D. constant
Answer: D
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Solve the problem.A lot is in the shape of a right triangle. The shorter leg measures 120 m. The hypotenuse is 40 m longer than the length of the longer leg. How long is the longer leg?
A. 120 m B. 200 m C. 240 m D. 160 m
Evaluate the integral.
A. - 
B. - 
C. - 
D. - 
+ 2 
Solve the problem.The annual population density of a species of insect after n years is modeled by a sequence. Suppose that the initial density of insects is 662 with r = 0.7. Write a recursive sequence that describes this data, where an denotes the insect density during year n.
A. an = 0.7 an+1 , a1 = 331
B. an = 0.7 an-1 , a1 = 662
C. an = 
, a1 = 662
D. an = 0.7 + an-1 , a1 = 662
Use the graph to solve the equation.
= x
A. -1, 0, 1 B. 1 C. -1 D. -1, 1