Solve the problem. First use front end rounding. Then find the exact answer.A particular model of side-loading washing machine costs $163 more than a top-loading machine. If the top-loading machine costs $268, find the cost of the side-loading machine.
A. Estimate: $430; exact: $431
B. Estimate: $100; exact: $105
C. Estimate: $500; exact: $431
D. Estimate: $110; exact: $105
Answer: C
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The graph of f(x) = ax2 + bx + c is given in the figure. Determine whether the discriminant is positive, negative, or zero.
A. Negative B. Positive C. Zero
Find the product.(4y2 - y + 2)(-3y3 - 6y + 3)
A. -12y5 - 3y4 - 30y3 + 18y2 - 15y - 6 B. 12y6 + 3y4 + 30y3 + 18y2 - 15y + 6 C. -12y5 + 3y4 - 30y3 + 18y2 - 15y + 6 D. -12y5 + 6y2 + 6
Tell which set or sets the number belongs to: natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers.
A. whole, real B. rational, real C. irrational, real D. real
Solve.The perimeter of a rectangle is 
inches and its length is 
inches. Find its width.
A. (2x2 + 3x + 9) inches
B. (3x2 + 4x + 14) inches
C. (x2 + x + 5) inches
D. (3x + 
) inches