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4 years ago

11

For the following system, if you isolated x in the first equation to use the substitution method, what expression would you subs

titute into the second equation?
−x + 2y = −6
3x + y = 8

1 answer:

Gwar [14]4 years ago

8 0

Answer:

x = 2y + 6

Step-by-step explanation:

-x + 2y = -6

-x = -6 - 2y

x= 6 + 2y

x = 2y + 6

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3 years ago

Rebecca wants to crochet (knit) a scarf that is at least 4.4 feet long. So far, she has completed 2.5 feet. How much more does R

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3 years ago

Solve by substitution -2x+5y=-17 y=-4x+1

Lera25 [3.4K]

Answer:

-2x +5(-4x+1) =-17

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3 years ago

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3 years ago

Read 2 more answers

Find the slope of the line that passes through the points (9, -2) and (4, 3)

vovikov84 [41]

Answer:

-1

Step-by-step explanation:

Formula: $y=mx+b$

<u>Using two points:</u>

Since we are given the $y$ and $x$ value, what is left is the $m$ and $b$ in the formula, which represent slope and the y-intercept.

<u>Slope</u>

$m$ is slope

Formula: $\frac{y_2-y_1}{x_2-x_1}$

Plug points: $\frac{3-(-2)}{4-9}$

Solve: $\frac{5}{-5}$

Simplify: $\bold{m=-1}$

Therefore, the slope is -1

Learn more:

<u>y-intercept</u>

$b$ is the y-intercept

Plug one of the points and the slope into the formula, solve for b: (4, 3)

$3=-1(4)+b$

$3=-4+b$

$3+4=-4+b+4$

$\bold{b=7}$

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3 years ago