Use a proportion to solve the problem.On a map of the Fox River, 1 centimeter represents 3.5 kilometers. If a trail by the river is actually 15.40 kilometers long, what is the length of the river on the map?
A. 4.4 centimeters
B. 6.9 centimeters
C. 11.9 centimeters
D. 6.4 centimeters
Answer: A
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Add or subtract. Simplify by combining like radical terms, if possible. Assume all variables and radicands represent nonnegative numbers.2
+ 7
A. -16
B. 9
C. 16
D. 12
Solve the system by substitution.x + y = 2x - y = 14
A. {(-8, -5)} B. {(7, -5)} C. ? D. {(8, -6)}
Solve the problem.Suppose c(x) = x3 - 16x2 + 20,000x is the cost of manufacturing x items. Find a production level that will minimize the average cost of making x items.
A. 9 items B. 8 items C. 10 items D. 7 items
Catalina works part-time at a bakery earning $7.50 an hour. In the last five days, her time card shows that she worked 3.3, 2.9, 4.0, 3.5, and 2.1 hours. What is her gross pay for the five days?
A. $118.50 B. $119.50 C. $122.50 D. $125.50