Perform the indicated operations.2.7 - (-7.5) - (-5.1)
A. 0.3
B. -9.9
C. -15.3
D. 15.3
Answer: D
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Solve the given differential equation. (The form of yp is given.)D2y - 3Dy = -3ex + xex (Let yp = Aex + Bxex .)
A. y = c1 + c2e3x + 
ex - 
xex
B. y = c1 + c2e3x - 
ex - 
xex
C. y = c1 + c2e3x + 
ex + 
xex
D. y = c1 + c2e3x - 
ex - 
xex
Solve. Round your answer to the nearest tenth, if necessary.An object is thrown upward from the top of a 
building with an initial velocity of 48 feet per second. The height, h, of the object after t seconds is given by the quadratic equation 
When will the object hit the ground?
A. In 5 seconds B. In 160 seconds C. In 2 seconds D. In 7 seconds
Graph the ellipse.
+ 
= 1
A. 
B. 
C. 
D. 
Find the unknown value in the percent proportion 
Round to the nearest tenth, if necessary.whole = 40, percent = 20
A. part = 8 B. part = 50 C. part = 20 D. part = 4