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Zigmanuir [339]
3 years ago
5

Help me i have homework

Mathematics
2 answers:
nadezda [96]3 years ago
3 0

3x - 5 = 10 or 3 × 5 - 5 = 10


y ÷ x - 4 = 14 or 36 ÷ 2 - 4 = 14

tatiyna3 years ago
3 0
2) 3x-5=10
You add 5 on both sides, so that the fives cancels.
3x-5=10
+5 +5
That leaves you with
3x=15
Then you have to get the x alone. You divide the three on both sides.
3x/3=15/3
The threes cancel out, so you now have
x=5

3) x
— -4=14
3
On this one you need to add 4 on both sides to cancel it out.
+4 +4
Since you just canceled the 4’s out that makes the equation...
X
— =18
3
Now you want to get x alone so you have to find a way to cancel the threes out. You times the three to the x/3.
3 X
— =18
3
What you do to one side you have to do to the other.
3 X
— =18x3
3
That leaves you with...
X=54

Hope this helped. Sorry if I’m late


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Rewrite algebraic expression for 3(y+10)​
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Anyone know it <br> will give you a 50points
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8 0
3 years ago
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Alex has 84 quarters and nickels worth a total of $17.80.
Hunter-Best [27]

The equation which can be used to find the number of quarters and nickels is; n + q = 84, 0.05n + 0.25q = 17.80.

<h3>Quarters and nickels</h3>

  • Total coins = 84
  • Total value = $17.80

let

  • Number of quarters = q
  • Number of nickels = n

n + q = 84

0.05n + 0.25q = 17.80

From equation (1)

n = 84 - q

Substitute into (2)

0.05n + 0.25q = 17.80

0.05(84 - q) + 0.25q = 17.80

4.2 - 0.05q + 0.25q = 17.80

- 0.05q + 0.25q = 17.80 - 4.2

0.20q = 13.60

q = 13.60 / 0.20

q = 68

Substitute q = 68 into

n + q = 84

n + 68 = 84

n = 84 - 68

n = 16

Therefore, the number of quarters and nickels are 68 and 16 respectively.

Learn more about quarters and nickels:

brainly.com/question/17127685

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6 0
2 years ago
Who knows how you do you this??
Monica [59]
Hi!
Okay, so this actually isn't too bad! (For number 5) Just add the negative x over to get 2x. Then subtract 2 over to get -10. Then divide by 2 (-5) and you're done! For the rest, do the same thing. Get the x's on one side, get the regular numbers on the other, and divide! Hope that helped!
4 0
3 years ago
Read 2 more answers
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