Find the y-intercept and graph the equation by hand.y = - 
x + 3
A. (0, 3)
B. (0, 3)
C. (0, 3)
D. (0, 4)
Answer: A
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Simplify the difference quotients 
and 
for the following function. Rationalize the numerator when necessary.f(x) = 3x3
A. 3x2 + 3xh + 3h2; 9x2 + 9ax + 9a2 B. 9x2 + 9xh + 3h2; 3x2 + 3ax + 3a2 C. 9x2 - 9x - 3h; 3x2 - 3ax - 3a2 D. 3x2 + 3xh + 3h2; 3x2 + 9ax + 9a2
Let 
?
Use a Riemann sum with four subintervals of equal length (
) to approximate the area of R (under the graph of f on the interval [0, 2]). Choose the representative points to be the left end points of the subintervals.
?
Repeat previous part with eight subintervals of equal length (
).
?
Compare the approximations obtained in previous parts with the exact area (4 sq units). Do the approximations improve with larger n?
?
A. 4.8 sq units; 4.4 sq units; yes
B. 4.4 sq units; 4.8 sq units; yes
C. 4.8 sq units; 4.4 sq units; no
D. 4.4 sq units; 4.8 sq units; no
Find the perimeter of the given square or rectangle.A 14 in. square ceramic tile
A. 56 in. B. 28 in. C. 196 in. D. 42 in.
Solve the problem.If f(?) = cot ? and f(a) = 4, find the exact value of f(a) + f(a + ?) + f(a + 3?).
A. 12 + 4? B. 4 C. 12 D. undefined