Hello!
8u - 8 = -7(u - 1) Given
8u - 8 = -7u + 7 Apply Distributive Property
15u - 8 = 7 Add 7u to both sides
15u = 15 Add 8 to both sides
u = 1 Divide both sides by 15
Answer:
u = 1
Hope this helps!
$81.60
( 20% of $68 is 13.60, so you add $68 and $13.60 and it’s $81.60 )
I've never done this b4, but i'm pretty sure u just multiply all those numbers together!
Answer: ![10x^2+3xy+6x-y^2+3y](https://tex.z-dn.net/?f=10x%5E2%2B3xy%2B6x-y%5E2%2B3y)
Step-by-step explanation:
You need to remember the Product of powers property:
![(a^m)(a^n)=a^{(m+n)}](https://tex.z-dn.net/?f=%28a%5Em%29%28a%5En%29%3Da%5E%7B%28m%2Bn%29%7D)
Then, knowing this property, now you have to apply the Distributive property. So:
![(2x+y)(5x-y+3)=\\\\=(2x)(5x)-(2x)(y)+(2x)(3)+(y)(5x)-(y)(y)+(y)(3)\\\\=10x^2-2xy+6x+5xy-y^2+3y](https://tex.z-dn.net/?f=%282x%2By%29%285x-y%2B3%29%3D%5C%5C%5C%5C%3D%282x%29%285x%29-%282x%29%28y%29%2B%282x%29%283%29%2B%28y%29%285x%29-%28y%29%28y%29%2B%28y%29%283%29%5C%5C%5C%5C%3D10x%5E2-2xy%2B6x%2B5xy-y%5E2%2B3y)
Finally, to simplify this expression, you need to add the like terms.
Therefore, you get that the product is:
![=10x^2+3xy+6x-y^2+3y](https://tex.z-dn.net/?f=%3D10x%5E2%2B3xy%2B6x-y%5E2%2B3y)