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abruzzese [7]
3 years ago
11

Solve each system by elimination. (Help! I’ll mark you brainly)

Mathematics
1 answer:
zheka24 [161]3 years ago
4 0

Answer:

2) y=-1       4)y=-1

Step-by-step explanation

    4x+8y=20

+  -4x+2y=-30

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

      10y=-10

isolate y by dividing 10 on each side

     y=-1

    -6x+5y=1

+    6x+4y=-10

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

    9y=-9

y=-1

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PLEASE HELP!! GIVING BRAINLIEST AND PLEASE EXPLAIN!!!
Ahat [919]

Answer:

64 cm²

Step-by-step explanation:

Area of a square: s²

s = 8 cm

(8)² = 64 cm²

6 0
3 years ago
Read 2 more answers
(2x+y=-2<br> 5x + 3y = -8<br> Solve by elimination
Effectus [21]

Answer:

y = -6, x =2

Step-by-step explanation:

To solve by elimination, you have to line both equations up together. Then, you multiply both equations until one variable is removed.

2x+y = -2

5x + 3y = - 8

There are many different ways to solve an elimination problem, but generally you should look for the simplest route. Here, I would multiply the top equation by -3.

-6x -3y = 6

5x +3y = -8

Imagine you are adding the two equations together. You end up with

-x = -2

Then solve for x. In this situation, it is fairly simple. Take out a factor of -1.

x = 2

Finally, choose one of your beginning equations and plug your new-found x value back into the equation.

2(2) +y = -2

4 + y = -2

y = -6

8 0
3 years ago
The circumference of a circle is 23π m. What is the area, in square meters? Express your answer in terms of \piπ
LenaWriter [7]

Answer:

Area of the circle =   \frac{529}{4}  π  m²    or      132.25 π  m²

Step-by-step explanation:

To find the area, we will follow the steps below.

First write down the formular for the circumference of a circle, then use the formula to find the radius of the circle after which you can now find the area of the circle.

That is;

C = 2πr

where c is the circumference of the circle and   r is the radius of the circle

From the question given, circumference C = 23π

23π = 2π r

Divide both-side of the equation by 2π

23π/2π  =  2πr/2π

23/2   =  r

radius =   \frac{23}{2}  m

Formula for calculating the area of a circle is given by;

A = πr²

where A= area of the circle   and   r is the radius of the circle

A = π ( \frac{23}{2} )²

A = \frac{529}{4}  π  m²    or      132.25 π  m²

Area of the circle =   \frac{529}{4}  π  m²    or      132.25 π  m²

6 0
3 years ago
9.58 as a mixed number
tankabanditka [31]
9.58 = 9 58/100 = 9 29/50
4 0
3 years ago
Read 2 more answers
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Rufina [12.5K]
I think i figured it out so it’s 0.37 :))))))))
4 0
3 years ago
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