Solve problems using a calculator.A local water district purchased its annual supply of water from three different sources. The number of acre-feet purchased and the cost per acre-foot for each source are shown in the following table. Calculate the average cost of water per acre-foot. (Round to the nearest dollar, if necessary.)Source Number of Acre-Feet Cost per Acre-FootReservoir X 1109 $649Well Water 2740 $208State Water 4775 $2896
A. $1748.62 per acre-foot
B. $1753.02 per acre-foot
C. $1752.98 per acre-foot
D. $1747.14 per acre-foot
Answer: B
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Solve.A young married couple had a combined annual income of $49,000. If the wife made $3000 more than the husband, graph the system to find the two incomes.
A. Wife's income: $6000 Husband's income: $43,000 B. Wife's income: $23,000 Husband's income: $26,000 C. Wife's income: $26,000 Husband's income: $23,000 D. Wife's income: $43,000 Husband's income: $6000
Find the area of the region.
16 yd
A. 512 sq yd B. 256 sq yd C. 251 sq yd D. 64 sq yd
Write the statement in symbols, using x as the variable, and find the solution by guessing or by using trial and error. All solutions come from the list of integers between -12 and 12 inclusive.5 less than a number is -1.
A. x - 1 = 5; 6 B. x + 5 = -1; -6 C. 5 - x = -1; 6 D. x - 5 = -1; 4
Solve.
= -8
A. {0} B. {0, -16} C. {0, 16} D. ?