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VashaNatasha [74]
3 years ago
10

Hello pls help with this problem

Mathematics
1 answer:
Strike441 [17]3 years ago
4 0

Answer: X= 4 or X= -5/2

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Solve the simultaneous equations 2x-y=7 3x+y=3
Debora [2.8K]

Answer:

<h2>( 2 , - 3 )</h2>

Step-by-step explanation:

Using elimination method:

2x - y = 7

3x + y = 3

--------------

5x = 10

Divide both sides of the equation by 5

\frac{5x}{5}  =  \frac{10}{5}

Calculate

x = 2

Now, substitute the given value of X in the equation

3x + y = 3

3 \times 2 + y  = 3

Multiply the numbers

6 + y = 3

Move constant to R.H.S and change it's sign

y = 3 - 6

Calculate

y =  - 3

The possible solution of this system is the ordered pair ( x , y )

<h3>( x , y ) = ( 2 , -3 )</h3>

---------------------------------------------------------------------

Check if the given ordered pair is the solution of the system of equation

2 \times 2 - ( - 3) = 7

3 \times 2 - 3 = 3

Simplify the equalities

7 = 7

3 = 3

Since all of the equalities are true, the ordered pair is the solution of the system

<h3> ( x , y ) = ( 2 , - 3 )</h3>

Hope this helps..

Best regards!!

4 0
3 years ago
What is the unit rate for this graph<br> 0 10<br> 2 7<br> 4 4<br> 6 1<br> 8 -2<br> 10 -5
Shalnov [3]

Answer:

if x gets +2 then y gets 3 taken away

4 0
3 years ago
What is the surface area of the cylinder with height 4 yd and radius 2 yd? Round your answer to the nearest thousandth.
Setler79 [48]

Answer:75.398

Step-by-step explanation:

6 0
3 years ago
brainly Mike's Bikes has mountain bikes that usually sell for $275 on sale for $220. Mike used this ratio to find the percent ch
kherson [118]

Answer:

20%

Step-by-step explanation:

20%

220 divided by 275 to get .8

80% then 80% minus 100%

=20%

8 0
3 years ago
Find the distance between the two points rounding to the nearest tenth (if necessary).
Vaselesa [24]

Hey there! I'm happy to help!

Imagine the line that is created when you connect the two points (the distance between the two points).

You can create a right triangle where this distance is the hypotenuse where the two legs are the change in x and y. So, if you take those changes in x and y, you can use the Pythagorean Theorem (a²+b²=c²) to find the distance between the two points, which is the hypotenuse.

Our change in x is 9 because 9-0 is 9.

We square it

9²=81

Our change in y is 5 as -1-(-6) or -1+6 is 5.

5²=25

We add these.

81+25=106

We square root and round to the nearest tenth.

√106≈10.3

So, our distance is 10.3.

This Pythagorean Theorem method actually gives us a formula called the distance formula that you can use to find the distance between points.

\sqrt{(x_{2} -x_{1})^2+(y_{2}-y_{1})^2}

Have a wonderful day and keep on learning! :D

8 0
3 years ago
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