Determine whether the given value is a solution to the given equation.Is 18 a solution to 38.3 - y = 20.3?
A. Yes
B. No
Answer: A
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Subtract.(0.7x4 - 0.8x3 + 0.9) - (4.6x4 + 2.1x - 1.3)
A. -3.9x4 - 0.8x3 - 2.1x + 2.2 B. -3.9x4 - 0.9x3 - 0.4 C. -3.9x4 - 0.8x3 - 2.1x - 0.4 D. -3.9x4 - 0.8x3 + 2.1x + 2.2
Solve the problem.Suppose a tank contains 100 gallons of a solution of 10 lb of salt dissolved in water, which is kept uniform by stirring. Pure water is allowed to flow into the tank at a rate of 3 gallons per minute, and the mixture flows out at a rate of 2 gallons per minute. How long will it take for the amount of salt in the mixture to be reduced to 4.5 lb?
A. Approx. 89 min B. Approx. 69 min C. Approx. 49 min D. Approx. 35 min
Write the binomial expansion of the expression.(-2x2 - y)5
A. 32x10 + 80x8y + 80x6y2 + 40x4y3 + 10x2y4 + y5 B. -32x10 - 80x8y + 80x6y2 - 40x4y3 + 10x2y4 - y5 C. -32x10 + 80x8y - 80x6y2 + 40x4y3 - 10x2y4 + y5 D. -32x10 - 80x8y - 80x6y2 - 40x4y3 - 10x2y4 - y5
Find an equation for the tangent to the curve at the given point.y = x2 - 1, (-3, 8)
A. y = -6x - 10 B. y = -6x - 20 C. y = -6x - 19 D. y = -3x - 10