B and c, anything with an x^2 term is a quadratic.
Answer:
Step-by-step explanation:
Given
Required
Solve for x
Subtract 5 from both sides
Divide through by 3
Answer:
y=3/4x-2.5
Step-by-step explanation:
This is a straight line, so it would follow the equation y=mx+b. You can find the b value by looking at the y-intercept of the equation (where x=0), which in this case would be -2.5. Then, you can find the m value by comparing the two given points' locations. Slope is rise over run, so first you can find the rise. The y value moves from y=-4 to y=2, which is a value of 6 units upward. The points move from x=-2 to x=6, which is a distance of 8 units. Finally, put it into the rise over run pattern, giving you 6/8, which simplified is 3/4. This is your m value. Finally, plug in your two variable values into y=mx+b and you'll get y=3/4x-2.5.
Let's come up with variables to substitute and make an equation.
T = total number of minutes
P = number of minutes used by each person in the phone plan
R = remaining minutes per month
R=T-3P
Now that we have an equation, we can substitute the numbers we are given in the problem to find the final solution.
R= 675- 3(250)
R= 675- 750
R= -75 minutes
There are no remaining minutes, and in fact, the people on the phone plan have used 75 extra minutes than provided for in their phone plan.