Translate to an equation, then solve.Four times the sum of a number and seven is equal to the number minus the difference of four and the number.
A. 4n + 7 = n - 4 - n, n = -7
B. 4(n + 7) = n - 4 - n, n = -8
C. 4(n + 7) = n - (4 - n), n = -16
D. 4(n + 7) = n - (4 - n), n = -32
Answer: C
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Convert the rectangular equation to polar form.y2 = 16x
A. r = 
B. r2 = 
C. r2 = 
D. r = 
Find the x- and y-intercepts of the graph of the equation. 5x - 30y = 30
A. x-intercept: -6; y-intercept: 1 B. x-intercept: 6; y-intercept: -1 C. x-intercept: -1; y-intercept: 6 D. x-intercept: 1; y-intercept: -6
Use a proportion to solve the problem.On a map of a nature trail, 1 centimeter corresponds to 3 miles. Find the length of a trail that is 2
centimeters long on the map. (Write your answer as a mixed number if necessary.)
A. 
mi
B. 47
mi
C. 1
mi
D. 7
mi
The figure shows two right triangles drawn at 
to each other.
?
?
If 
, 
, and 
, find x and then find h.
?
Round each answer to the nearest whole number.
?
A. ?
B. 
C. ?
D. ?
E. ?