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alexgriva [62]
3 years ago
5

Find the values of x and

Mathematics
1 answer:
SVEN [57.7K]3 years ago
4 0

Answer:

x+2jsvwb w gskcbs shihdks sjixn

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Solve the system of equations by using substitution.<br> x+8y=-2<br> x-3y=20
zysi [14]

Answer:

(14, -2)

Step-by-step explanation:

To solve by using substitution, begin by solving for a variable in the first equation. Let's solve for x:

x+8y=-2\\x=-2-8y

Now we know what <em>x</em> equals. Let's substitute this into the second equation:

x-3y=20\\(-2-8y)-3y=20

We can then simplify:

-2-8y-3y=20 Given equation

-2-11y=20 Combine y terms

-11y=22 Add 2

y=-2 Divide by -11

So, we now know the value of y = -2.

To find the value of X, we can substitute the value of Y into one of the equations. Let's use the first one:

x+8y=-2

x+8(-2)=-2 Substitute for y

x-16=-2 Distribute 8

x=14 Add 16

So, we now know the value of x = 14.

Therefore, we know a solution to the system of equations is (14, -2).

4 0
3 years ago
I WILL MARK BRAINLIEST!
Luba_88 [7]

Answer:

1.true

2.false

3.false

4.true

5.true

6.false

Step-by-step explanation:

just graph it and look at it

7 0
2 years ago
How do work this out
BabaBlast [244]
We can factor this by using grouping. Take the leading coefficient and multiply it by the constant. In this case we get 5*-7 = -35. 

Now we need 2 numbers that add to 2 and multiply to be -35. The numbers are -5 and 7.

So split the 2r into these two terms and group.

(5r^2 - 5r) + (7r - 7)

Factor both groups.

5r(r-1) + 7(r-1)

The factors of (r-1) can be added together to get the answer.

(r-1)(5r+7)
6 0
3 years ago
Which of the following equations could be used to solve for x in the triangle shown?
iVinArrow [24]

Answer:

a

Step-by-step explanation:

because do sin 48 x X to find it

7 0
2 years ago
Read 2 more answers
Plss help mee answer my homework plss im begging u
vagabundo [1.1K]

Answer:

1.80 2.90 3. 135

Step-by-step explanation:

1. 80°

2. 90°

3. 135°

4 0
3 years ago
Read 2 more answers
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