The equations in this system were added to solve for y. What is the value of y?
X+6y- 10
- X+3y=-15
9y=-5

The value of y is -5/9.

Step-by-step explanation:

The system of equations is:

Add the two equations and solve for y as follows:

x + 6y =  10

-x + 3y = -15

_________

      9y = -5

        y = -5/9

Thus, the value of y is -5/9.

part a

in a city ice cream is mostly only bought when the temperature is very high as ice cream cools down our

so we can derive the conclusion that as the temperature increases the number of ice creams sold also increases

part b

y intercept is 5

slope is 2

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