Translate the sentence to an equation using the variable x. Then solve the equation.Four times a number added to 9 times the number equals 65.
A. 4(x + 9) = 65x; -5
B. 9x + 4x = 65; 5
C. 9x - 4x = 65; 5
D. 4x(9 + x) = 65; -5
Answer: B
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Perform the computation.-12 - (-4)
A. 8 B. -8 C. -16 D. 16
Write the equation of the line in 
form, given the slope and y-intercept.Slope is - 
; and y-intercept is 4
A. y = - 
x - 4
B. y = - 
x + 4
C. y = 
x - 4
D. y = 
x + 4
Solve.A pendulum bob swings through an arc 80 inches long on its first swing. Each swing thereafter, it swings only 66% as far as on the previous swing. What is the length of the arc after 10 swings? Round your answer to two decimal places, if necessary.
A. 0.83 inches B. 475.2 inches C. 1.9 inches D. 1.25 inches
Determine an estimate of the exact answer. Use estimation by rounding.Linda scored 92, 75, 60, 68, 94, and 100 on her calculus tests. Round each score to the nearest ten to estimate her total score.
A. 480 B. 500 C. 470 D. 490