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vesna_86 [32]
3 years ago
12

Substitution. (6 points) 3x + 2y = 11 y = 5x - 1 {show work}

Mathematics
1 answer:
nexus9112 [7]3 years ago
8 0
3x+2y=11
y=5x-1

Substitute the y in the first equation:
3x+2(5x-1)=11
y=5x-1

3x+10x-2=11
y=5x-1

13x=13
y=5x-1

Now substitute the x to find the y:
x=1
y=5-1=4
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kvasek [131]

C, 80 square feet.

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3 years ago
Write the point-slope equation of the line that passes through (7, 3) whose slope is 2.
Vitek1552 [10]

Answer:

y - 3 = 2(x - 7).

Step-by-step explanation:

The point-slope form is

y - y1 = m(x - x1) where m = slope and (x1, y1) is a point on the line.

So the answer is:

y - 3 = 2(x - 7).

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3 years ago
Find m∠CXY<br> Please help with this, this is for my test review!!!
Murljashka [212]

Answer:

137°

Step-by-step explanation:

All angles in a triangle add up to 180° always.

Now imagine the two smaller shapes as a bigger triangle, CED.  The measure of angle CED is 89°, and CDE is 48°.  Do the math, and angle DCE is 43°.

But notice how the corresponding sides of the two smaller shapes are congruent.  (CX=XE, and DY=YE)  Meaning, the measure of angle C is equal to the measure of angle YXE.

We're almost there.  CXY (what we're looking for) and YXE are supplementary angles, meaning the angle measures add up to 180.  180-43 = 137°.

5 0
3 years ago
Which equation represents a line which is parallel to the line y = 1/5x-1?
insens350 [35]

Step-by-step explanation:

You posted no answer choices, but a parallel oline has the same slope, so it is in the form

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5 0
3 years ago
Write the simple linear regression equation for miles per gallon as the response variable and weight as the predictor variable.
horsena [70]

The simple linear regression equation for miles per gallon as the response variable and weight as the predictor variable is

M = \beta0 + \beta1W + ε

The car rental company can use this model to determine the effect of weight (of the car) on miles per gallon.

Given: To write a simple linear regression equation with Miles per gallon as the response variable and weight as the predictor variable.

What is simple linear regression?

Simple linear regression is used to estimate the relationship between two quantitative variables.

Let's say "Miles per gallon" is represented as M and

"Weight" be represented as W

The simple linear regression equation is :

M = \beta0 + \beta1W + ε

where,

  • M is Miles per gallon, the response variable also known as the dependent variable shows a predicted value for any given value of the independent variable W.
  • \beta0 is the intercept, the predicted value of M when W is 0
  • \beta1 is the regression coefficient -  how much we expect M to change as W increases.
  • W is the predictor variable also known as the independent variable ( the variable that is influencing M )
  • ε is the error of the estimate, or how much variation there is in our estimate of the regression coefficient.

How might the car rental company use this model?

The car rental company might use the regression model to determine the

  • Effect of weight (of car) on miles run per gallon

Know more about "simple linear regression" here: brainly.com/question/14313391

#SPJ4

4 0
2 years ago
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