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allsm [11]
3 years ago
6

5 times the sum of 12 and a number is 80 What is the value of the unknown number

Mathematics
1 answer:
kirill115 [55]3 years ago
3 0

Answer:

4

Step-by-step explanation:

5(12+x)=80          Create equation. x is the unknown number.

60+5x=80           Distributive property.

5x=20                  Isolate variable.

x=4                       Divide on both sides by the coefficient.

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Ivan

Answer:

The surface area of the prism is 276 in.²

If you are also looking for the volume of the prism, it is 280.

Step-by-step explanation:

It's hard to find the surface area and the volume of the prism if you're just looking at the net of the 3D shape. There are some unnecessary measurements that will definitely throw you off. I drew a sample prism so it's easier to solve. Check the linked image.

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The formula in finding the volume of the prism is V = w * h * l, where w is for width, h is for height, and l is for length. Simple multiplication of 3 different sides and you'll get the volume. I hope this helps and if I am wrong please let me know! :D

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