Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.a1 = -9, d = 0.6
A. an = 0.6n - 9.6; a20 = 2.4
B. an = -9n + 0.6; a20 = -179.4
C. an = 0.6n - 9; a20 = 3
D. an = -9n + 9.6; a20 = -170.4
Answer: A
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Provide an appropriate response.Find the direction in which the function is increasing most rapidly at the point P0.f(x, y) = xy2 - yx2, P0(-1, 1)
A. 
i + 
j
B. 
i + 
j
C. 
i - 
j
D. 
i - 
j
Solve.A total of 24 cu yd of concrete is required for pouring a foundation. The ratio of cement to sand to gravel for this application is 1:3:4, and the total amount of these components must be 
times the volume of concrete needed. Determine how many cubic yards of each component are needed.
A. 4.5 cu yd of cement, 13.5 cu yd sand, 18 cu yd gravel B. 4.0 cu yd of cement, 13.0 cu yd sand, 18.5 cu yd gravel C. 3.0 cu yd of cement, 12.0 cu yd sand, 16.5 cu yd gravel D. 3.5 cu yd of cement, 12.5 cu yd sand, 16.5 cu yd gravel
Add or subtract as indicated. Express the answer as a single polynomial in standard form.(-7x2 + 2) - (-x3 + 3x2 + 8)
A. -6x3 + 3x2 - 6 B. -6x3 + 5x2 - 8 C. x3 - 10x2 - 6 D. x3 - 4x2 + 10
Solve.The pitch of a screw is the distance between threads. With each complete rotation of the screw, it goes in or out a distance equal to its pitch. How far will a screw with a pitch of 
in. go into a piece of wood when it is turned 10 complete rotations clockwise?
A. 
in.
B. 
in.
C. 
in.
D. 
in.