Rewrite the decimal as a fraction in lowest terms.0.392
A.
B.
C.
D.
Answer: D
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Use the method of undetermined coefficients to solve the differential equation.y'' + 4y' + 4y = x2 - 3x
A. y = C1e-2x + C2e2x + x2 -
x +
B. y = (C1 + C2x)e-2x + x2 -
x +
C. y = (C1 + C2x)e-2x + x2 +
x -
D. y = C1e-2x + C2e2x + x2 -
x -
Simplify, if possible, by combining like terms.-3b + 6b
A. 3b B. -3b C. 3b2 D. Cannot be simplified
Use a graphing calculator to plot the data and find the quadratic function of best fit.An engineer collects data showing the speed s of a given car model and its average miles per gallon M. Use a graphing calculator to plot the scatter diagram. What is the quadratic function of best fit?
A. M(s) = 0.063x2 + 0.720x + 5.142 B. M(s) = -0.631x2 + 0.720x + 5.142 C. M(s) = -6.309x2 + 0.720x + 5.142 D. M(s) = -0.0063x2 + 0.720x + 5.142
Find the product.(8x + 7)(8x - 7)
A. 64x2 + 112x - 49 B. x2 - 49 C. 64x2 - 49 D. 64x2 - 112x - 49