All categories

2 years ago

5x+5y=0 -8x+y=36 I need help with this.

2 answers:

5 0

First because 5x+5y=0 you can factor the 5
from equation so:
5(x+y) =5 (0) => x+y=0
and by solving for × using elimination method
-8x+y=36
x+y=0
by subtracting both x and y we get
-9x=36 => x=-4
by inputing × into the "x+y=0" equation so we get:
-4+y=0 => y=4

Anettt [7]2 years ago

3 0

Answer:

x= -4, y = 4.

Step-by-step explanation:

first, divide the first equation by its G.C.D (5), to obtain its simplest form.

5x/5 + 5y/5 = 0/5 to obtain x + y = 0.

Then, find the value of y by rearranging the second equation.

y = 36 + 8x. (Rem; when 8x moves to the other side of the equation, it changes the sign)

Now substitute the value of y (36 + 8x) in the first equation which is x + y = 0.

x + 36+8x = 0

Put like terms together.

36 + 9x = 0

move 9x to the other side and change its sign.

36 = -9x

divide both sides by 9,

x = -4.

Lastly, find the value of y by replacing the value of x in either equation.

-8(-4) + y = 36

32 + y = 36

rearrange to obtain

y = 36 - 32

y = 4.

You might be interested in

Im cyril anne bato you what your name

Andrej [43]

Answer:

heyyyyyyyyyyyyyyyyyyyyyyyyy

4 0

2 years ago

A livestock pen is built in the shape of a rectangle that is 2 times as long as it is wide. The perimeter is 30 feet. If the mat

shutvik [7]

Answer:

$57.5 is the total cost to build the pen.

Step-by-step explanation:

We are given the following in the question:

A livestock pen is built in the shape of a rectangle.

The length of rectangle is two times the width.

Let l be the length of rectangle and w be the width of rectangle. Thus, we can write

$l = 2w$

Perimeter = 30 feet

$\text{Perimeter of rectangle} = 30\\2\times (l\times w) = 30$

Putting values,

$2(2w + w) = 30\\6w = 30\\w = 5\\l = 2w = 10$

The length of rectangle is 10 feet and width of rectangle is 5 feet.

If the material used to build the pen is $ 1.75 per foot for the longer sides and $ 2.25 per foot for the shorter sides

Cost of building =

$=2\times(\text{Cost of length}\times \text{Length} + \text{Cost of width}\times \text{Width})\\=2\times(1.75\times 10 + 2.25\times 5)\\=57.5$

Thus, $57.5 is the total cost to build the pen.

7 0

3 years ago

Which cannot be represented by this eqation 3x+4=19

Elena-2011 [213]

Answer:2

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

HELP DUE IN 5 MInUTes ASAp

musickatia [10]

Answer:

The expression that calculates the speed in meters per second of an object that travels a distance of 100 m every 20 s is $\mathbf{Speed=\frac{100}{20} }$

Step-by-step explanation:

We are given:

Distance = 100 m

Time = 20 s

We need to find:

Speed

The formula used is: $Speed=\frac{Distance}{Time}$

Putting values and finding the expression

$Speed=\frac{Distance}{Time}\\Speed=\frac{100}{20}$

So, the expression that calculates the speed in meters per second of an object that travels a distance of 100 m every 20 s is $\mathbf{Speed=\frac{100}{20} }$

<em>Note: Kindly recheck your options, As option B is not written correctly.</em>

5 0

3 years ago

Solve this plz

frozen [14]

A) 9(x + 4) = 27

9x + 36 = 27

9x = 27 - 36

9x = -9

x = -9 ÷ 9

x = -1

B) x/3 - 5 = 6

x/3 = 6 + 5

x/3 = 11

x = 11 × 3

x = 33

C) 15 + 3 ( x -7 ) = -30

15 + 3x - 21 = -30

3x + 15 - 21 = -30

3x - 6 = -30

3x = -30 + 6

3x = -24

x = -24 ÷ 3

x = -8

5 0

3 years ago

Read 2 more answers