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omeli [17]
3 years ago
8

7.8+ (x-18)=31 Please Help Asapty​

Mathematics
2 answers:
lidiya [134]3 years ago
8 0

Answer:

x=41.2

Step-by-step explanation:

hope this helps

Anit [1.1K]3 years ago
3 0

Answer:

x=41.2

Step-by-step explanation:

First, subtract 7.8 from both sides of the equation, resulting in x-18=23.2

Then, add 18 to both sides of the equation, creating x=41.2

Hope this helps.

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Write a story about temperatures that this expression could represent: ½ + (-¾)
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Step-by-step explanation:

4 0
3 years ago
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3x+2y=23<br> 1/2x-4=y<br><br> What should I do for this one...? I dont really understand
Hitman42 [59]

Since you have y alone on one side of the equation......

Use substitution and plug in 1/2x-4 for y in the other equation.


3x+2(1/2x-4)=23\\

Distribute

3x+x-8=23

Combine like terms

4x-8=23

Add 8 to both sides

4x=31

Divide by 4

and x=31/4

Plug this value in for x

31/4*1/2-4=y

Simplify

31/8-4=y

Multiply everything by 8 and simplify

31-32=8y\\-1=8y

Divide.....

y=-1/8


Your answers are:

y=-1/8\\x=31/4



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3 years ago
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koban [17]

I had that question yesterday

8 0
3 years ago
What is the percent of change to 125 centimeteres 87.5 centimeters?
MrRa [10]
I hope this helps you

125-87,5=37,5

125 37,5

100 ?

?.125=100.37,5

?=3750/125

?=30


30%
5 0
3 years ago
Expand and simplify: (x-5)(x+5)
stealth61 [152]
X^2-5x+5x-25 (multiply (x-5) with (x+5))
X^2-25 ( -5x+5x =0)





5 0
4 years ago
Read 2 more answers
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