Question

check my work please?

Answer 1

the question is: solve the system by substitution
-4.5x - 2y = -12.5
3.25x - y =-0.75

Answer 2

and my answer is :
3.25x -y = -0.75
y= 3.25x+00.75
so substitute
-4.5x - 2(3.25x + 0.75) = -12.5

and then distribute the -2

Answer 3

so then you get -4.5 - 6.5x + 2.43 = -12.5
-11x + 2.43 = -12.5

-2.43 on both sides so
-11x= -14.93

and then divide by 11
so x = 1.35

Answer 4

and to get y you just put it back in so 3.25(1.35) + 0.75
and y = 5.13

Answer 5

oh my, I see a mistake there :(

Answer 6

what is it :(

Answer 7

im not very good at this :(

Answer 8

No worries, we all make mistakes, I see it when you distribute de (-2) on 0.75.
The result is -1.5

Answer 9

what is the mistake??? i dont undrestand is 1.5 supposed to be the answer

Answer 10

-4.5x - 2(3.25x + 0.75) = -12.5

and then distribute the -2
You'll end with:
4.5 - 6.5x -1.5= -12.5
Take over from there :)

Answer 11

ohhhhhhhhh so 3 - 6.5x= -12.5

Answer 12

so -6.5x= 15.5

Answer 13

i still got 2.38

Answer 14

and then for y i got 8.4

Answer 15

is that correct

Answer 16

it is correct, yes :)