Find a formula for the sum of the first n terms of the sequence 9, 21, 36, 54, 75,….
a. 
b. 
c. 
d. 
a.
A formula for the sum of the first n terms of the sequence 9, 21, 36, 54, 75,… is
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Factor completely.60x2 + 35xy + 5y2
A. 5(3x + y)(4x + y) B. 5(3x - y)(4x - y) C. (3x + y)(20x + 3y) D. (15x + 5y)(4x + y)
Provide an appropriate response.Solve the following using a constant of variation: The volume of a gas is inversely proportional to the pressure on it. If the gas has a volume of 250 in.3, under a pressure of 32 pounds per square in (psi), what will the volume be if the pressure is decreased to 24 psi?
A. 333.3 in3 B. 187.5 in3 C. 0.3 in3 D. 3.1 in3
Find the volume of the indicated region.The region bounded by the paraboloid 
and the xy-plane
A. 9?
B. 
?
C. 27?
D. 
?
Find an equation of the secant line containing (1, f(1)) and (2, f(2)).f(x) = 
A. y = (-5
- 7)x - 5
+ 14
B. y = (-5
+ 7)x + 5
- 14
C. y = (5
- 7)x - 5
+ 14
D. y = (5
- 7)x + 5
- 14