Translate the problem to a system of equations, then solve using matrices.Mardi received an inheritance of $70,000. She invested part at 10% and deposited the remainder in tax-free bonds at 8%. Her total annual income from the investments was $6400. Find the amount invested at 10%.
A. $63,600
B. $20,000
C. $40,000
D. $39,000
Answer: C
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Solve the problem.To approximate the speed of a river, a circular paddle wheel with radius 0.68 feet is lowered into the water. If the current causes the wheel to rotate at a speed of 8 revolutions per minute, what is the speed of the current? If necessary, round to two decimal places.
A. 34.18 mph B. 0.19 mph C. 0.39 mph D. 0.06 mph
Use a graphing calculator to find the solutions of the equation. Round solutions to the nearest hundredth.x2 + 7.58x + 9.06 = 0
A. -6.09, -1.49 B. 1.49, 6.09 C. -8.53, -2.08 D. -4.87, -1.19
Solve the application.In a recent school PTA election, two candidates were running for president. Of the 99 votes cast, Mr. Menken received 11 fewer votes than Mrs. Meng. How many votes did Mrs. Meng receive?
A. 66 votes B. 44 votes C. 110 votes D. 55 votes
Determine whether the expression is a partial sum of an arithmetic or geometric sequence. Then find the sum. : 5+25+125+...+3125
(a) 19530 (b) 7810 (c) 3125 (d) 3280 (e) 3905