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4 years ago

Solve the system of equations by substitution x+y=18, y=5x

Mathematics

2 answers:

Lostsunrise [7]4 years ago

7 0

One way to do it is

Plug in y so 5y + x =18

Divide both sides by 5 to get y alone

Subtract the answer of 18÷5 =3.6

3.6- 18 = 14.4

14.4 is your answer

Artyom0805 [142]4 years ago

4 0

Answer:

(3, 15 )

Step-by-step explanation:

Given the 2 equations

x + y = 18 → (1)

y = 5x → (2)

Substitute y = 5x into (1)

x + 5x = 18

6x = 18 ( divide both sides by 6 )

x = 3

Substitute x = 3 into (2) for corresponding value of y

y = 5(3) = 15

Solution is (3, 15 )

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Veronika [31]

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5 0

3 years ago

I need this in final factored form! I’m a little stuck

kobusy [5.1K]

Answer:

$\sqrt{227}$ = 15.0665191733^2 + 1 i think lol if not im sorry, its been a while since i've done this

Step-by-step explanation:

6z^3 = 216z

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+ 1

add all of the numbers with the variable z together

216 + 9 + 2 = 227z + 1

$\sqrt{227}$ = 15.0665191733^2 + 1

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3 years ago

Con you solve D+D+D =30 Fill the boxes using { 1, 3, 5, 7, 9, 11, 13, 15}

liraira [26]

11+13+7-1=30
I think this is answer
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6 0

4 years ago

NEED ASAP!!!! Assessment items Select from the drop-down menu to correctly identify the property shown. (−3.4+(−1.5))+6.2=−(3.4

Vikki [24]

Commutative property.

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3 years ago

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jeka94

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3 years ago

Read 2 more answers