Solve using the percentage formula.70 is 20% of what number?
A. 14
B. 350
C. 3,500
D. 35
Answer: B
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For the given value of x, determine the value of y that gives a solution to the given linear equation in two unknowns.1.4y - 1.2x = -4.44; x = 0.2
A. -0.2 B. -0.4 C. -3.0 D. 3.0
Write or illustrate the number in the indicated form.64; Express in expanded form.
A. 6 ? 100 + 4 ? 101 B. 6 ? 101 + 4 ? 100 C. 6 ? 101 + 4 ? 102 D. 6 ? 102 + 4 ? 101
Find the directrices of the hyperbola.x2 - y2 = 16
A. x = ± 
B. x = ± 
C. y = ± 4
D. y = ± 
First, use front-end rounding to round each number and estimate the answer. Then, find the exact answer.Mr. Buttimer took a plane trip for a total of 5.5 hours. He watched an in-flight movie for 1.84 hours. From the airport, he took a cab ride for 0.78 hour to the train station. Next, he took the train home for 1.98 hours. What was the total time spent traveling?
A. Estimate: 12 hours; exact: 10.1 hours B. Estimate: 11 hours; exact: 8.26 hours C. Estimate: 9 hours; exact: 8.26 hours D. Estimate: 11 hours; exact: 10.1 hours