Solving systems of equations using substitution

Mathematics

1 answer:

wariber [46]4 years ago

3 0

Y = 3 - x. this is equation 1
8x + y = -4. this is equation 2
since equation 1 already defined the value of y in terms of x, we can substitute it into 2
8x + 3 - x = -4
7x = -7
x = -1
as x = -1, substitute it back into equation 1,
y = 3 - (-1)
y = 3 +1
y = 4

You might be interested in

a man pays 330 each month for his gym membership what is the change in the amount of money in his account after two thirds of a

olasank [31]

$\dfrac{\$330}{1\,month}\times\dfrac{12\,month}{1\,year}\times\dfrac{2}{3}\,year\\\\=\$2640$

The account will have decreased by $2640 after 2/3 year.

6 0

3 years ago

Suppose that Y has a gamma distribution with parameters α and β. a If a is any positive or negative value such that α + a > 0

Nookie1986 [14]

Answer:

2nd option

Step-by-step explanation:

makes most sense

3 0

3 years ago

Describe and correct the error a student made when graphing y+5=-3/4(x-8).

Elis [28]

In step 1 the y-intercept should be plotted at (0,-6)
Step-by-step explanation:
Remember that to find the Y intercept in any linear equation you need to use 0 as your X value, this means taking the formula in the y=mx+b form and replacing X with a 0.
Since the formula is y = -3/4x -6
We just insert a 0 insted of the "x"
y = -3/4(0) -6
y=0-6
y=6
So the y-intercept sould be placed in (0,-6)
That's what he did wrong when graphing the equation.

8 0

3 years ago

Claire Judice

Julli [10]

Answer:

The values of 'x' are -1.2, 0, 0, $-4i$ or $4i$ .