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Kaylis [27]
2 years ago
7

Solve by substitution. Show each step of your work.

Mathematics
2 answers:
Kitty [74]2 years ago
5 0

Answer:

x = 3, y = 0

Step-by-step explanation:

First we find a variable to cancel out. Y will be easiest.

Multiply that equation by -2 to create -8x-2y = -24

Now we can cancel y out and solve for x.

add the variables together to make 10x = 30

x = 3

Now that we have x, we can plug it in for either equation to find y.  

4(3) + y = 12

y = 0

zaharov [31]2 years ago
3 0

5x + y = 15

y = -5x + 15

Substituting y= -5x+15 from first equation into second equation:

3x + 2y = 16

3x + 2·(-5x + 15) = 16

3x - 10x + 30 = 16

-7x + 30 = 16

7x = 30 - 16 = 14

x = 2

Substituting x=2 into the first equation:

5x + y = 15

5(2) + y = 15

10 + y = 15

y = 15 - 10

y = 5

So your final answers are x=2 and y=5.

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Hello there.

<span>How to solve 6x-3=7x-11</span>
<span><span><span>6x</span>−3</span>=<span><span>7x</span>−11</span></span>
<span><span><span><span>6x</span>−3</span>−<span>7x</span></span>=<span><span><span>7x</span>−11</span>−<span>7x</span></span></span><span><span><span>−x</span>−3</span>=<span>−11</span></span>
<span><span><span><span>−x</span>−3</span>+3</span>=<span><span>−11</span>+3</span></span><span><span>−x</span>=<span>−8</span></span>
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Answer: 8
6 0
3 years ago
1<br> Select all relations that are functions from the choices below
Daniel [21]

Answer:

Option (D).

Step-by-step explanation:

If the graph of a relation has two output values for a single input value, relation will not be considered to be a function.

Option (A).

For the input values of x = -1, there are two output values, y = -1, 1.

Therefore, given relation is not a function.

Option (B).

Since, all the parabolas don't represent a function, given parabola in the graph is not a function.

Option (C).

Not a function. It's a relation.

Option (D).

Line plotted in the graph has a distinct output value for every input value.

Therefore, the given graph represents a linear function.

7 0
3 years ago
Pls help fast!!! giving 20 points!!!
tester [92]
It’s y=2x-6 for sure
5 0
3 years ago
21 increased by twice Gail's height<br> Use the variable g to represent Gail's height.
dmitriy555 [2]

The expression represented by 21 increased by twice Gail's height is 21 + 2g

<h3>What are expressions?</h3>

Expressions are mathematical statements that are represented by variables, coefficients and operators

<h3>How to translate the algebraic expression?</h3>

The expression is given as

21 increased by twice Gail's height

Where

g represents Gail's height

So, we have

21 increased by twice Gail's height ⇒ 21 increased by twice g

Twice means 2*

So, we have

21 increased by twice Gail's height ⇒ 21 increased by 2g

increased by means +

So, we have

21 increased by twice Gail's height ⇒ 21 + 2g

Hence, the expression represented by 21 increased by twice Gail's height is 21 + 2g

Read more about expressions at

brainly.com/question/22019327

#SPJ1

6 0
9 months ago
Can someone please help me on this, i’m way too tired to deal with this.
vivado [14]
The answer is 10 days passing time for every kitten saved. Your would divide the total number of days by the five friends to get 100 days for every friend, then you would evenly divide the 50 kittens to each of the friends' allotted times (100 days) which end up with 10 kittens for every hundred days. Divide the 100 days by the 10 allotted kittens to get one kitten for every 10 days.
7 0
3 years ago
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