Solve the problem.Suppose that the labor cost for a building is approximated by 
where x is the number of days of skilled labor and y is the number of days of semiskilled labor required. Find the x and y that minimize cost C.
A. x = 210, y = 210
B. x = 70, y = 210
C. x = 100, y = 70
D. x = 200, y = 140
Answer: C
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Write the expression in simplest form. If a radical appears in the denominator, rationalize the denominator.
A. 3ab
B. 3
C. -3a2b
D. 3ab
Solve the inequality numerically. Approximate endpoints to the nearest tenth.2.9
+ 1.5x ? 2
A. x ? 1.7 B. x ? -1.9 C. x ? 1.9 D. x ? -1.7
Solve the problem.Sue drove her car 275 miles in January, 328 miles in February, and 253 miles in March. If her average mileage for the four months from January to April is to be at least 292 miles, how many miles must she drive in April?
A. at most 292 miles B. at most 312 miles C. at least 312 miles D. at least 287 miles
Find the distance between the points. Round to the nearest hundredth, if necessary.
(9,6). (7,-3) A) 18.36 B) 9.22 C) 3.61 D) 16.28 E) 10.44