Use a graphing calculator to solve the system of equations. Round your solutions to one decimal place.1.8x + 2.8y - 2.6z = 3.13.5x - 6.6y + 1.1z = -5.02.8x + 3.6y + 5.7z = 11.2
A. {(1.6, 2.6, 1.5)}
B. {(0.8, 1.3, 0.8)}
C. {(3.2, 5.2, 3.0)}
D. {(0.4, 0.7, 0.4)}
Answer: B
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Write in expanded notation.Christopher withdraws $294 from his account. He requests the minimum number of bills in one-, ten-, and hundred-dollar bills. Describe the quantity of each denomination of bills the teller must give Christopher.
A. 10 twenty-dollar bills, 9 ten-dollar bills, 4 one-dollar bills B. 9 hundred-dollar bills, 2 ten-dollar bills, 4 one-dollar bills C. 4 fifty-dollar bills, 9 ten-dollar bills, 4 one-dollar bills D. 2 hundred-dollar bills, 9 ten-dollar bills, 4 one-dollar bills
Solve the problem.The decay of 291 mg of an isotope is given by 
where t is time in years. Find the amount left after 47 years. (Round to the nearest milligram.)
A. 52 mg B. 101 mg C. 285 mg D. 103 mg
Solve for part in the problem. Round to the nearest hundredth, if necessary.8.4% of 24 yards
A. 202 yd B. 20.2 yd C. 0.2 yd D. 2.02 yd
Find the volume of the specified solid. Use 3.14 as the approximate value of ?, and round your answer to the nearest tenth.A sphere with radius 0.55 in.
A. 1.3 in.3 B. 5.6 in.3 C. 0.4 in.3 D. 0.7 in.3