Simplify the polynomial by adding or subtracting, as indicated. Express your answer as a single polynomial in standard form.(4x2 + 7x + 10) - (8x2 + 3)
A. -4x2 + 7x + 7
B. 12x2 + 7x + 13
C. -4x2 + 4x + 10
D. 12x2 + 4x + 10
Answer: A
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Find the centroid of the region bounded by the given curves.The region bounded by the x-axis and the curve y = 5sin x, 0 ? x ? ?
A. 
= 
, 
= 
B. 
= ?, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Write as the sum and/or difference of logarithms. Express powers as factors. log16
A. log16s - log1619 - 
log16r
B. log1619 + 
log16r - log16s
C. log1619 ? 
log16m ÷ log16s
D. log16(19
) - log16s
Sketch the graph of the equation. Identify the vertex and the intercepts.y = x2 + 2x - 3
A. Vertex: (1, - 4);
x-intercepts: (-1, 0) and (3, 0);
y-intercept: (0, -3)
B. Vertex: (- 1, - 4);
x-intercepts: (3, 0) and (1, 0);
y-intercept: (0, -3)
C. Vertex: (- 1, - 4);
x-intercepts: (-3, 0) and (1, 0);
y-intercept: (0, -3)
D. Vertex: (1, - 4);
x-intercepts: (-1, 0) and (3, 0);
y-intercept: (0, 3)
Use the table of record trout lengths at Yosemite Lake to answer the question. To find the average, add up the values you are interested in and then divide the sum by the number of values. Round your answer to the nearest tenth. 
Find the average length of record trout caught during the weekend.
A. 25.6 in. B. 10.2 in. C. 12.8 in. D. 3.7 in.