Solve using Cramer's rule. 2x - 2y = 2 3x + 4y = 59
A. (-8, 9)
B. (-9, -8)
C. (8, 9)
D. (9, 8)
Answer: D
Mathematics
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Calculate the arc length of the indicated portion of the curve r(t).r(t) = (7cos3 8t)j + (7sin3 8t)k; 
? ? t ? 
?
A. 
B. 
C. 0
D. 21
Mathematics
Solve the problem.A car is traveling at 42 mph. If its tires have a diameter of 28 inches, how fast are the car's tires turning? Express the answer in revolutions per minute. If necessary, round to two decimal places.
A. 1008.4 rpm B. 488.2 rpm C. 504.2 rpm D. 3168 rpm
Mathematics
Evaluate the expression.(f ? f)(6) when f(x) = 4x - 1 and g(x) = 4x2 - 5
A. 23 B. 91 C. 101 D. 19
Mathematics
Write the ratio as a fraction in lowest terms. Be sure to make all necessary conversions.5
days to 4
weeks
A. 
B. 
C. 
D. 
Mathematics