If $y=x+6$ and $y=-2x-3$ , then you can replace $y$ in either equation with the equivalent expression given by the other equation. In this case, you have

$x+6=-2x-3$

and you can solve for $x$ .

$x+2x+6-6=-2x+2x-3+6\implies3x=3\implies\dfrac{3x}3=\dfrac33\impliesx=1$

Then $y=1+6=7$ .

For the second system, you can write

$5x-y=-5\implies 5x-5x-y=-5-5x\implies-y=-5-5x$

$\implies-(-y)=-(-5-5x)\implies y=5+5x$

Then substitute this into the second equation and you get

$3x-6(5+5x)=24\implies3x-30-30x=24\implies-27x-30+30=24+30$

$\implies-27x=54\implies x=2$

so that

$y=5+5(2)=15$

8 0

4 years ago

Please help! NO LINKS PLESE!

vodka [1.7K]

C. ax^2+bx+c=1

please correct me if im wrong!! have a great day!! :)

5 0

3 years ago

What are the solutions of the equation |2x - 2| = 8

schepotkina [342]

Answer: x= 5 and -3

Step-by-step explanation:

Hope this helps

5 0

3 years ago

Read 2 more answers

A psychologist is studying how children acquire math skills. She gives the same question to children

ivann1987 [24]

Answer:

D:0.48

Step-by-step explanation:

Hopefully this helps!

7 0

3 years ago

What type of angle is this​

What type of angle is this