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Anon25 [30]
3 years ago
13

Solve the system using substitution. Show your work. x = -4y + 9 x - y = 4

Mathematics
2 answers:
lesya692 [45]3 years ago
7 0
X = -4y + 9
x - y = 4

- rearrange the second equation to x = 4 + y
- then we can plug it into x for the first equation

4 + y = -4y + 9 — then we solve for y
y = -4y + 5
5y = 5 -> y = 1

we can then plug in 1 (our y value) into the original second equation.

x - 1 = 4 -> x = 5

x = 5 & y = 1
you should put it in a coordinate layout so:
(5,1)

hope this helped !!
FromTheMoon [43]3 years ago
6 0

Answer:

please what should we found? is it the value of ×or y

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Mekhanik [1.2K]
What are you confused by?
5 0
4 years ago
I really need help plz
Montano1993 [528]

Answer: A

it's the first option

Step-by-step explanation:

Because when you replace x=30 and then add them together you'll get the values

6 0
3 years ago
.please answer this question i will mark it brainliest
IceJOKER [234]

Answer:

a = 20.79cm ( 2 decimal places)

Step-by-step explanation:

find the length of the identical sides (i name it "x") first using Pythagoras theorem

14.8^{2} = x^{2} + x^{2}

219.04 = 2x^{2}

x^{2} = 219.04/2 = 109.52

x = \sqrt{109.52}

now find a,

a^{2} = (\sqrt{109.52}) ^{2} + (7.5 + \sqrt{109.52}) ^{2}

a^{2} = 109.52 + 322.7477 = 432.2677

a = \sqrt{432.2677} = 20.791048

7 0
3 years ago
Move the dot to the number that equals 7 X
balu736 [363]

Answer:

the answer is 21

Step-by-step explanation:

8 0
3 years ago
Help me on the first question
Tresset [83]
34.7 - (12.07 + 4.9) = 
34.7 - 16.97 =
17.73 <===
7 0
3 years ago
Read 2 more answers
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