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tia_tia [17]
3 years ago
14

The sum of twice a number and 6 is 14. Find the number

Mathematics
2 answers:
V125BC [204]3 years ago
8 0
The number is 4. 15-6=8 divide that by 2 and you are left with 4
sergey [27]3 years ago
4 0

First, write an equation:

2x+6=14

We want to get x by itself, so next we should subtract 6 from both sides and get

2x=8

Finally, divide both sides by 2 and get

x=4

The number is 4

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Step-by-step explanation:

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Step-by-step explanation:

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One day a store sold 21 sweatshirts. white ones cost​ $9.95 and yellow ones cost $ 11.50. in​ all, ​$235.30 worth of sweatshirts
FromTheMoon [43]
For this problem you have yo set up two equations.

White shirts = w Yellow shirts = y

1st: w + y = 21
2nd: 9.95w + 11.50y = 235.30

Now we're going to do system of equations using substitution.

If w + y = 21, then y = 21 - w
If y = 21 - w, then you can substitute this in the second equation for y.

9.95w + 11.50(21 - w) = 235.30
9.95w + 241.5 - 11.50w = 235.30
-1.55w + 241.5 = 235.30
-1.55w = -6.2
w = 4, so 4 whites shirt were sold.

Now I'm finding out how many yellow shirts were sold using one of the two equations at the top.

w + y = 21
4 + y = 21
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So 17 yellow shirts were sold and 4 white shirts were sold.
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3 years ago
The height of a right cylinder is 3 times the radius of the base. The volume of the cylinder is 241 cubic units.
kifflom [539]

Answer: 6 units

Step-by-step explanation:

8 0
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