Find the area of the triangle. If necessary, round the answer to two decimal places.? = 20°, b = 13, c = 4
A. 6.89
B. 24.43
C. 26.43
D. 8.89
Answer: D
Mathematics
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Solve the problem.Bob owns a watch repair shop. He has found that the cost of operating his shop is given by 
where c is cost and x is the number of watches repaired. How many watches must he repair to have the lowest cost?
A. 20 watches B. 36 watches C. 73 watches D. 39 watches
Mathematics
Estimate the answer by rounding as indicated.Estimate by first rounding to the nearest ten.
A. 150 B. 5600 C. 5160 D. 5159
Mathematics
Write the opposite of the polynomial and simplify your result.15a2 - 5a + 5
A. 15a2 + 5a - 5 B. 15a2 - 5a + 5 C. -15a2 - 5a - 5 D. -15a2 + 5a - 5
Mathematics
Find the product.(x - 7y)(x - 2y)
A. x - 9xy + 14y B. x2 - 12xy + 14y2 C. x2 - 9xy + 14y2 D. x2 - 9xy - 9y2
Mathematics