Solve the problem.Jeremy was ordered to perform 630 hours of community service by picking up litter along the highway. Jeremy spends 7 hours each day picking up litter. The equation that tells the number of hours (y) that remain on the sentence after x days is y = 630 - 7x. Find the y-intercept of this equation, and explain what it signifies.
A. (630, 0) The original sentence is 630 hours.
B. (0, 90) The original sentence is 90 hours.
C. (90, 0) After 90 days, there are no more required hours.
D. (0, 630) The original sentence is 630 hours.
Answer: D
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Find the solution by graphing the system of equations.A tour group split into two groups when waiting in line for food at a fast food counter. The first group bought 6 slices of pizza and 5 soft drinks for $27.52. The second group bought 5 slices of pizza and 4 soft drinks for $22.64. We can represent this situation with the system of equations 6p + 5s = 27.52 5p + 4s = 22.64where p is the cost of a slice of pizza and s is the cost of a soft drink. Determine the cost of one slice of pizza.
A. $2.26 per slice of pizza B. $3.12 per slice of pizza C. $1.76 per slice of pizza D. $2.62 per slice of pizza
Mentally estimate the number that should go in the blank to make the statement true.6 is 
% of 23.5.
A. About 10 B. About 50 C. About 25 D. About 75
Use Descartes's rule of signs to discuss the possibilities for the roots of the equation. Do not solve the equation.3x6 - 8x4 - 5x3 + 3x2 - 5x = 0
A. 
B. 
C. 
D. 
Model the curve with a sine function.
?
?
?
Note that the period of the curve is 
and its range is 
and the graph of the sine function is shifted to the left 0.55 units.
?
A. 
B. 
C. 
D. 
E. 