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const2013 [10]
3 years ago
11

How to solve 4y=x 3x- y=70 using substitution

Mathematics
1 answer:
creativ13 [48]3 years ago
7 0
X = 4y
3x - y = 70

substitute the x in the second equation with the other half of the first equation.

3(4y) - y = 70
12y - y = 70
11y = 70
y = 6.36 repeating, or 6 4/11

now use this to solve first equation
x = 4 (6 4/11)
x = 25.45 repeating

done
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Please answer this question !! Will give brainliest to the best answer and 30 points !!
sergey [27]

Hi,

Get knowledge *throw math book at brain*

8 x 8 x 8 is 512 so its not a or b, add that to 6 times 6 and it equals d 546,

Answered by Britton have a nice day:)

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3 years ago
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I really need help with this section
Tpy6a [65]

Looks like you did most of it.

The next step would be setting them equal to 105, like the problem suggests.

5z+3x+7x=105

15x=105

x=7

Then we can plug back in to find the numbers.

5*7=35

3*7=21

7*7=49

35+21+49=105

The three numbers are 35, 21, 49.

Hope this helps.

頑張って!

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3 years ago
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Tim runs 3 miles every 45 minutes. At this rate, how long did it take Tim to run 18 miles?
geniusboy [140]

Answer: 270 minutes or 4 hours and 30 minutes

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3 years ago
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Fudgin [204]
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Find the area of the equilateral triangle whose sides are 4 yd.
suter [353]

Answer:

The first one. 4 times square root of 3.

Step-by-step explanation:

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