Question

I just need b please

please also explain, this is one of the last problems i need to do for this!​

Answer 1

`((3)/(2) , -(5)/(4))`

Answer 2

Answer: They intersect at
`((3)/(2),-(5)/(4) )`

Explanation:

x-2y = 4

7x + 2y = 8

We will solve the equations using the substitution method so we will solve for y in one of the equations and and substitute it into the other equation to solve for x.

x - 2y = 4

-x -x

-2y = 4 - 1x Divide both sides by -2

y = 1/2 x - 2 Now use substitution

7x + 2( 1/2x -2) = 8

7x + 1x - 4 = 8

8x -4 = 8

+4 +4

8x = 12

x = 12/8 and simplifies to 3/2

the value of x is 3/2 so plot it into one of the equations and solve for y.

7(3/2) + 2y = 8

21/2 + 2y = 8

-21/2 -21/2

2y = -5/2

y = -5/4