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Elena-2011 [213]
3 years ago
6

What is the value of x in the solution of the system of equations below?8x-y=20Y=3x​

Mathematics
2 answers:
SashulF [63]3 years ago
5 0

Answer:

32-12=20 or x=4

Step-by-step explanation:

This is basically saying 8x-3x=20

so first you want to do 8x-3x to end up with 5x

then from there you have the equation..

5x=20

in order to figure out what x is you need to divide 20 by five so you just have the x and get rid of the 5

so 20 divided by 5 = 4

this means x=4 but you need to plug it into the equation

8x= 8 times 4 = 32   and   3x= 3 times 4 = 12

so 32-12=20

tatyana61 [14]3 years ago
4 0

Answer:

x=4

where y =3x

8x-3x=20

5x=20

5x/5=20/5

x=4

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TJ invested $4000 in a bond at a yearly rate of 2% for 30
slavikrds [6]

Answer:

2.5 years

Step-by-step explanation:

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4 0
3 years ago
Plz answer quickly will mark brainless
den301095 [7]

Answer:

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Step-by-step explanation:

equation 12h+10>70

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3 years ago
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Kobotan [32]

Answer:

40% decrease

Step-by-step explanation:

First, let's find the value decrease of the item from yesterday to today

$65 - $39 = $26

That means that $65 was 100% of the price and decreasing it by 26 gets us to 39

We need to find the percentage of 39 in 65

39/65 = 0.6 or 60%

If 39 is 60% of 65, then there was a 40% decrease form 100%

To check we can calculate the percentage of 26 in 65:

26/65 = 40%

There was a 40% decrease

-Chetan K

6 0
2 years ago
You use 4 gallons of water on 30 plants in your garden. At that rate, how much water will it take to water 45 plants?
OverLord2011 [107]
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The price of a silk scarf is $32. The sales tax is $1.92. What is the sales-tax rate?
aliya0001 [1]
Divide.
32/1.92=~16.67
The tax is roughly 16.67%
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3 years ago
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