Sara's earnings vary directly with the number of hours she works. the data is shown in the graph. if x = number of hours worked, and y = earnings, which equation models sara's direct variation?
a) y = 5x
b) y = 10x
c) y = 5 + x
d) y = 10 + x

Which of the following is an equation of a line parallel to the equation y=4x+1?

Solve 2 - 3 cos x = 5 + 3 cos x for 0° ≤ x ≤ 180° a. 150° b. 30° c. 60° d. 120°

In a certain city, the hourly wage of workers on temporary employment contracts is normally distributed. the mean is $15 and the standard deviation is $3. what percentage of temporary workers earn less than $12 per hour? a. 6% b. 16% c. 26% d. 36%