Solve the system by graphing. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(-2, -5)}
B. {(5, -2)}
C. no solution; ?
D. {(-2, 5)}
Answer: A
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Solve.From a 40-inch by 40-inch piece of metal, squares are cut out of the four corners so that the sides can then be folded up to make a box. Let x represent the length of the sides of the squares, in inches, that are cut out. Express the volume of the box as a function of x. Give the function and state its domain.
A. V = 4x3 - 160x2 + 1600x: x < 40 B. V = 4x3 - 160x2 + 1600x: 0 < x < 20 C. V = 2x3 - 120x2 + 40x: 0 < x < 20 D. V = 2x3 - 120x2 + 1600x: x >0
Set up, but do not evaluate, an integral that represents the length of the parametric curve.
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Write the sentence as an equation. Let the variable x represent the number.The sum of twice a number and 7 is 17.
A. 2x - 7 = 17 B. 14x = 17 C. 2x + 7 = 17 D. x + 14 = 17
Graph the function.f(x) = 3x
A. 
B. 
C. 
D. 