How many solutions does the system have? \begin{cases} y = -2x-4 y = 3x+3 \end{cases} ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ y=−2x−4 y=3x+3 How many solutions does the system have? \begin{cases} y = -2x-4 y = 3x+3 \end{cases} ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ y=−2x−4 y=3x+3 How many solutions does the system have? \begin{cases} y = -2x-4 y = 3x+3 \end{cases} ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ y=−2x−4 y=3x+3

x = -7/5 y = -6/5

Step-by-step explanation:

System:

y = -2x-4

AND

y= 3x+3

therefore -2x-4 = 3x+3

-2x-3x = 3 + 4

-5x = 7

x = -7/5

y = 3(-7/5) + 3 = -21/5 + 3 = -6/5

both graphs increase on their domain

neither graph has a y-intercept

step-by-step explanation:

the following points can be visualized easily from the graph

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15