Use your graphing calculator to find the x-intercepts of the function to the nearest tenth.f(x) = 2x2 + 8x + 7
A. -1.3, -2.7
B. -0.6, -1.4
C. 0.7, -4.7
D. -3.3, -4.7
Answer: A
Mathematics
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Use the regression formula for the data below to estimate the value of 
.
x 1.37 3.39 4.96 6.73 y 44.22 39.28 36.71 32.82
What will be an ideal response?
Mathematics
Find the mass of the wire that lies along the curve r and has density ?.r(t) = (10 cos t)i + (10 sin t)j + 10tk, 0 ? t ? 2?; ? = 9
A. 20?
units
B. 180?
units
C. 18? units
D. 1800?
units
Mathematics
Solve. Write the solution set using set-builder notation and using interval notation. Graph the solution set. x + 1 < 12
A. {x
x ? 11}; [11, ?)
B. {x
x < 11}; (-?, 11)
C. {x
x ? 11}; (-?, 11]
D. {x
x > 11}; (11, ?)
Mathematics
Graph the linear equation.y = 5x
A. 
B. 
C. 
D. 
Mathematics