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3 years ago

How do I write an equation in slope intercept form from; Slope 3, y-intercept at -4

Mathematics

2 answers:

mash [69]3 years ago

8 0

Slope-intercept form is y=mx+b
the y-intercept is b
the slope is m
enter these in, and you have y=3x-4

Minchanka [31]3 years ago

7 0

The slope-intercept form of the equation for a line is

y = (slope) x + (intercept). <== THIS is the important thing to remember.

You already have both numbers to plug into that form.
The equation of your line is
 y = 3x - 4

That's all there is to it.

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3 years ago

What is the first step to solve the following system of equations using substitution?

Akimi4 [234]

Answer:

Step 1: Solve one of the equations for one of the variables. Let's solve the first equation for x

Thus, option A) is true.

The solution to the system of equations be:

$x = 4, y = 5$

Step-by-step explanation:

It is important to remember that when we solve the system of equations, the first step we need to do is to solve one of the equations for one of the variables.

Given the system of equations

$x - y = -1$

$2x - y = 3$

Step 1: Solve one of the equations for one of the variables. Let's solve the first equation for x

$x-y=-1$

Add y to both sides

$x-y+y=-1+y$

$x=-1+y$

Thus, option A) is true.

NOW LET US SOLVE THE REMAINING PORTION

$\mathrm{Subsititute\:}x=-1+y$ to solve for y

$\begin{bmatrix}2\left(-1+y\right)-y=3\end{bmatrix}$

$-2+y=3$

$y=5$

For x = -1 + y

substitute y = 5

$x=-1+5$

$x=4$

Thus, the solution to the system of equations be:

$x = 4, y = 5$

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3 years ago

Y+7=-2(x-1) hurry plz

zhannawk [14.2K]

Answer:

y=-2x-5

Step-by-step explanation:

First of all, you have to distribute -2 to (x-1) to get to this equation y+7=-2x+2. Then, you subtract 7 on both sides to get the slope-intercept of y = -2x - 5.

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3 years ago

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Mashutka [201]

Answer:

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Step-by-step explanation:

-5 = -8 - (- 3)

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