Work out 1/2 x 7 giving your answer as a mixed number

Mathematics

1 answer:

irga5000 [103]3 years ago

7 0

Answer:

$4\frac{1}{2}$

Step-by-step explanation:

This question is basically saying: what is half of 7, or what is 7 divided by 2?

Based on this, it can be written both of the ways as:

»» $\frac{1}{2}$ of 7 <u>OR</u> 7 ÷ 2

So, just solve using either one and you’ll get 4.5 or $4\frac{1}{2}$ . But since the question wants the answer to be a mixed number, then choose $4\frac{1}{2}$ .

Hope this helps! :)

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The rectangular prism below is made up of 6 rectangular faces, and the faces opposite to each other are have an equal area.
The area of one of the faces is lxh or lh, and the area of the face opposite to it is also equal, so the area of those two equal faces is 2lh.
The area of the base of the prism is lxw, and the area of its opposite face is equal, so the area of those two equal faces is 2lw.
The area of the face in the left side of the prism is wxh, and the area of the face opposite to it is also equal, so their combined area is 2wh.
So, to find the total surface area of a rectangular prism, we’d add the sum of all the rectangular faces, so the formula of finding the surface area of a rectangular prism=
2lh+2lw+2wh
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Given,
Surface area of the rectangular prism=288 cm^2
2(lh+lw+wh)=288
2[4h+(4x9)+9h)]=288
4h+(4x9)+9h=288/2
4h+(4x9)+9h=144
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h=8.308 cm
Hope this helps!