X=2y
2x+5y=9
substitute the x=2y into the second equation
2(2y)+5y=9
multiple the 2y by 2. 4y+5y=9
combine like terms. 9y=9
divide the 9 out from both sides. y=1
plug the y back into the first equation
x=2(1)
multiply. x=2
your answer is: x=2
y=1
We know
Sum of two interior angles=exterior angle
Hope it helps
1. In this problem, the variable x represents how many pounds of hamburger meat you're buying. So, to solve the expression, just replace x with how much you're buying, in this case, 7.
2.50x Plug in 7 pounds for x
2.50(7) Multiply
17.50
You will pay $17.50 for 7 pounds of hamburger meat.
2. 8 times (8 x) the product (multiplication) of g and h.
The product of g and h means you multiply them, so it will be gh. Then, you'll multiply that by 8 and get 8gh. So, the correct answer is choice B.
