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xxMikexx [17]
3 years ago
12

X + 4y = 13

Mathematics
2 answers:
Ymorist [56]3 years ago
5 0
So when i think of the elimination method, it’s literally just cancelling numbers out then lining up the numbers and adding. so in this case, i would cancel out the x’s, but that’s just me, you could cancel out the y’s if you’d like. in order to cancel out the x’s you would multiply the second equation by -1, it would look like this

-1(x-y=3) i’ll just do the work and you can see what i mean. see picture for reference

the answer would be (5,2)
Shalnov [3]3 years ago
3 0

\bf \begin{array}{llrrlllll} x+4y&=13&&x&+4y&=13\\ x-y&=3\implies \stackrel{\textit{multiplying this one by }}{-1}&&-x&+y&=-3\\ \cline{4-6}\\ &&&0x&+5y&=10 \end{array} \\\\\\ 5y=10\implies y = \cfrac{10}{2}\implies \boxed{y = 2} \\\\\\ \stackrel{\textit{since we know that}}{x-y=3}\implies x-(2)=3\implies \boxed{x = 5} \\\\[-0.35em] ~\dotfill\\\\ ~\hfill (\stackrel{x}{5}~~,~~\stackrel{y}{2})~\hfill

notice, is called the elimination method, because we eliminate one of the variables, either one, in this case the "x", by simply multiplying one of the equations by a value that gives us the negative equivalent of the other, and of course same - same = 0.

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the winner of a raffle will receive a 21-foot outboard boat. if 2000 raffle tickets were sold and you purchased 50 tickets, what
DerKrebs [107]
I honestly have no idea
5 0
3 years ago
Diana paints 150 fence posts and chuck paints 130 fence posts. Diana paints 10 more fence posts than chuck. How many fence posts
statuscvo [17]

Complete Question

The  complete question is shown on the first uploaded image

Answer:

Step-by-step explanation:

From the question we are told that

  The  relationship is  \frac{150 }{d}   = \frac{130}{c}

   The number of fence post painted by chuck is  l = 130

    The number of fence post painted by Diana  is k =  150

    can paint 10 fences more than chuck  so let say the  of fence painted in an hour by chuck is g

     Then  the number of fence post painted by Diana in one hour is

          f =  g+ 10

 So

       \frac{150 }{ g + 10 }   = \frac{130}{g}

       130 g  + 1300 =  150g

        g =  65 \  m

5 0
4 years ago
Write a linear function f with f(0) = 7 and f(3) =1.
Kipish [7]
(0,7) and (3,1) are points on the line.

Slope of line passing through (x₁, y₁) and (x₂, y₂) = (y₂-y₁)/(x₂-x₁)

Slope of line passing through (0, 7) and (3, 1) = (1-7)/(3-0) = -2
4 0
3 years ago
HELP ME PLEASEEEEEEEEEE
eimsori [14]

Answer:

1. ratio - 1:4 (side to perimeter)

2. ratio - 4:1 (perimeter to side)

3. ratio - 1: 2 (radius to diameter)

Step-by-step explanation:

for 1. I just put 6/24 which simplies to 1/4. I tried the that with the rest and it equalled to 1/4

for 2. put 24/6 which is 4 (in fraction from 4 is 4/1)

for 3. 4/8 which equals to 1/2

4 0
3 years ago
Is y=3x in slope-intercept form​
andrew11 [14]

Answer:

yes

Step-by-step explanation:

slope intercept for is y=mx+b

m = slope

b = y intercept

y = 3x means the slope of 3 with the y intercept being 0

5 0
4 years ago
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