Answer:
x = 1
, y = 2
Step-by-step explanation:
Solve the following system:
{2 x - 3 y = -4
x + 3 y = 7
Hint: | Choose an equation and a variable to solve for.
In the second equation, look to solve for x:
{2 x - 3 y = -4
x + 3 y = 7
Hint: | Solve for x.
Subtract 3 y from both sides:
{2 x - 3 y = -4
x = 7 - 3 y
Hint: | Perform a substitution.
Substitute x = 7 - 3 y into the first equation:
{2 (7 - 3 y) - 3 y = -4
x = 7 - 3 y
Hint: | Expand the left hand side of the equation 2 (7 - 3 y) - 3 y = -4.
2 (7 - 3 y) - 3 y = (14 - 6 y) - 3 y = 14 - 9 y:
{14 - 9 y = -4
x = 7 - 3 y
Hint: | Choose an equation and a variable to solve for.
In the first equation, look to solve for y:
{14 - 9 y = -4
x = 7 - 3 y
Hint: | Isolate terms with y to the left hand side.
Subtract 14 from both sides:
{-9 y = -18
x = 7 - 3 y
Hint: | Solve for y.
Divide both sides by -9:
{y = 2
x = 7 - 3 y
Hint: | Perform a back substitution.
Substitute y = 2 into the second equation:
{y = 2
x = 1
Hint: | Sort results.
Collect results in alphabetical order:
Answer: {x = 1
, y = 2
Answer:
would it be negative 4
Step-by-step explanation:
Answer:
So W is going to stand for width and L is going to stand for length.
L= 2W+6
78=2L + 2W
Those are the two equations you will use. So plug in L=2W+6 into the other one and solve.
78= 4W+12 +2W
(simplify)
78=6W+12
(-12 from both sides)
66=6W
(divide by 11)
W=11
Replug W into your equation to find L.
L=22+6
(simplify)
L=28
I hope this is right
Step-by-step explanation:
Answer:
(-1,-5), (0,0) , (1,5) , (2,10)
Step-by-step explanation:
The answers are the points you need to plot.
To solve for any points just use
f(x)=5x
Plug your any number to x to find that point
Example
F(1)= 5(1)
f(1)=5
Point is (1,5)
Y = x
get another answer to be sure