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
Mathematics
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