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3 years ago

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20. MATHEMATICAL PRACTICE © Explain Terry added 3 and 7. He got a sum of 9. His answer is not correct. Describe how Terry can fi

nd the correct sum.

1 answer:

vfiekz [6]3 years ago

8 0

Answer:

He can just count on his fingers or continue counting from 3 all the way until you add seven fingers to the original three

Step-by-step explanation:

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3 years ago

A flat rectangular piece of aluminum has a perimeter of 62 inches. The length is 15

dexar [7]

Answer:

Width of rectangular piece = x = 8 inches

Step-by-step explanation:

Perimeter of rectangular piece = 62 inches

Let width of rectangular piece= x

and length of rectangular piece = x+15

We need to find width i.e value of x

The formula used for perimeter of rectangle is: $Perimeter=2(Length+Width)\\$

Putting values in formula and finding Width:

$Perimeter=2(Length+Width)\\\\62=2(x+x+15)\\62=2(2x+15)\\62=4x+30\\62-30=4x\\4x=32\\x=\frac{32}{4}\\x=8$

After solving we get value of x = 8

So, Width of rectangular piece = x = 8 inches

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