Answer:
x= -1
Step-by-step explanation:
since y is -5 then we would put that in the second equation:
2x - 4(-5) = 18
then it’s:
2x + 20 = 18
Then we subtract 20 from both sides
2x = -2
Last we divide both by 2 and we get x = -1
Answer:
if adding its 139 if u subtract then its 11
Step-by-step explanation:
<h3>
Answer:</h3>
![x^2+8x+15](https://tex.z-dn.net/?f=x%5E2%2B8x%2B15)
<h3>
Explanation:</h3>
Use the FOIL method of multiplying binomials.
First term in each binomial: ![x*x=x^2](https://tex.z-dn.net/?f=x%2Ax%3Dx%5E2)
Outside terms: ![x*5=5x](https://tex.z-dn.net/?f=x%2A5%3D5x)
Inside terms: ![3*x=3x](https://tex.z-dn.net/?f=3%2Ax%3D3x)
Last term in each binomial: ![3*5=15](https://tex.z-dn.net/?f=3%2A5%3D15)
Add them all together. ![x^2+5x+3x+15](https://tex.z-dn.net/?f=x%5E2%2B5x%2B3x%2B15)
Simplify. ![x^2+8x+15](https://tex.z-dn.net/?f=x%5E2%2B8x%2B15)