-7x-y=13 8x+y=-14 what is the answer?
1 answer:
So i am guessing that those are two different equations so for the equation:
-7x-y=13 your answer is
. How is this?
Well you have to add y to both sides of the equation so it would look like this:
and so when you add it up it will look like this:
notice that the negitive y became a positive and went to the other side of the equation. So now what? well know you can divide by -7 so like this:
so then once you do all of that your answer becomes:
.
Now for your second equation and just look in the attachment it is explained in written from not text XD. Good Luck~!
-7x-y=13 your answer is
Well you have to add y to both sides of the equation so it would look like this:
Now for your second equation and just look in the attachment it is explained in written from not text XD. Good Luck~!
You might be interested in
Answer:
The answer that gives the best estimate is (1,1)
Step-by-step explanation:
i) As can be seen on of the lines intercepts the y axis at (0,-1). So the y
intercept or = -1. Therefore the equation for this line can be written as
y = x +
⇒ y =
x - 1 . It can also be seen from this graph that the
line passes through the point (2 , 2). Substituting these values for x and y
respectively we get 2 = 2 - 1 ∴
=
. The equation of the first line
can be written as y = x - 1 ⇒ 2y - 3x = -2
ii) As can be seen on the other line the intercept on the y axis is at (0,2). So
the y intercept or = 2. Therefore the equation for this line can be
written as y = x +
⇒ y =
x + 2 . It can also be seen from this
graph that the line passes through the point (1 , -1). Substituting these
values for x and y respectively we get 1 = 1 + 2 ∴
= -1 . The
equation of the second line can be written as y = - x + 2 or x + y = 2
iii) Solving the two equations of the two lines respectively as found in i) and
ii) we get y = 0.8. We multiply equation in ii) by 3 to get 3x + 3y = 6 and
when we add this to equation in i) we get 5y = 4 which means that y = 0.8.
If we substitute this value in ii) we get 0.8 + x = 2 , therefore x = 1.2.
iv) Therefore we get the solution of the two lines, which is the intersection
of the two lines as (1.2, 0.8). So the answer that gives the best estimate
is (1,1)