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xz_007 [3.2K]
3 years ago
12

Solve the system of equations by substitution

Mathematics
1 answer:
r-ruslan [8.4K]3 years ago
6 0
We have y=2x and y=x+2
They both equal y, so substitute the first equation for y in the second equation.
2x=x+2
Let’s get x to one side. Let’s subtract x from both sides.
X=2
Since x=2, just plug in 2 for x.
2+2=4
So,
X=2
Y=4















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qaws [65]

Answer:

Are you solving for x? If so, x = 6

4 0
3 years ago
The price of a $100 item after successive discounts of 10% and 15% is:
Burka [1]
Hello there,
Actual price = $100
After 10% discount = $100 - (10/100 x 100)
                               = $90
After 15% discount = $90 - (15/100 x 90)
                               = $76.50
Final cost - $76.50

Hope this helps :))


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5 0
3 years ago
How to work out 6=a\4+2
Travka [436]
\frac{a}{4}+2=6\ \ \ \ \ |subtract\ 2\ from\ both\ sides\\\\\frac{a}{4}=4\ \ \ \ \ \ |multiply\ both\ sides\ by\ 4\\\\\boxed{a=16}

3 0
3 years ago
Read 2 more answers
Please someone help <br> I need this
Sunny_sXe [5.5K]

Answer:

the triangle

Step-by-step explanation:

The perimeter is the sum of the all sides of the shape.

Triangle:

3√147+2√108+2√48+3√75+ 6√12

147=49•3, 108=36•3, 48=16•3, 75=25•3, 12=4•3 that means

√147=7√3, √108=6√3, √48=4√3, √75=5√3, √12=2√3

perimeter=3•7√3+2•6√3+2•4 √3+3•5√3+6•2√3=68√3

Square:

4•1/3•√63=4/3•√9•√7=4√7

Rectangle:

2•1/4√100+2(2√48+4√75)=

5+2(8√3+20√3)=5+56√3

Now, if you use a calculator, you will find that the greatest perimeter is for the triangle shape.

8 0
3 years ago
The length of a rectangular window is 5 feet more than its width, w. The area of the
Ilya [14]

Answer:

The equation could be used to find the dimensions of the  window would be:  w^{2}  + 5w = 36

Step-by-step explanation:

as

  • The length of a rectangular window is 5 feet more than its width, w.

and

  • The area of the  window is 36 square feet.

So it means

l = w + 5

A = lw

36 = (w + 5)w

w^{2}  + 5w = 36

Therefore, the equation could be used to find the dimensions of the  window would be:  w^{2}  + 5w = 36

8 0
3 years ago
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