Solve the problem.Roberto invested some money at 8%, and then invested $5000 more than twice this amount at 12%. His total annual income from the two investments was $4760. How much was invested at 12%?

A. $3100
B. $31,000
C. $15,000
D. $26,000


Answer: B

Mathematics

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Simplify the expression. Use positive exponents. Assume variables represent nonzero real numbers.6

A. x12
B.
C.
D. x36

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Find the zeros of the function. Give approximate solutions rounded to three decimal places when necessary.f(x) = 3x2 - x + 5

A. 0.167 ± 1.28 B. 0.167 ± 1.28i C. 0.167 ± 2.56 D. 0.167 ± 2.56i

Mathematics

Simplify the expression. ? - 9 - ( 10 - 4 ) ?

A. - 15 B. 15 C. - 23 D. - 3 E. 23

Mathematics

Solve the problem.Determine the resultant effect of three people pulling on a car as shown in the drawing.  a = 75.0 lb, b = 77.0 lb, c = 52.0 lb, d = 32°, e = 22° Round results to an appropriate number of significant digits.

A.  = 198 lb, ? = 17°
B.  = 95 lb, ? = 12°
C.  = 190 lb, ? = 6°
D.  = 110 lb, ? = 33°

Mathematics