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xxTIMURxx [149]
3 years ago
7

The perimeter of a rectangle is 40 units. One side of the rectangle is 7 and the other is x+2. What's the value of x?

Mathematics
2 answers:
FromTheMoon [43]3 years ago
7 0
Formula for perimeter of rectangle = 2l + 2w

Substitute

40 = 2(7) + 2(x+2)
40 = 14 + 2x + 4
40 = 18 + 2x
22 = 2x
/2     /2
11 = x

Therefore 11 = x

Proof:

x + 2 = ?
11 + 2 = 13

13 + 13 + 7 + 7 = 40
lapo4ka [179]3 years ago
6 0
Try 18 and then multiply the sum of 2 and 18 to 7
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The surface areas of two similar solids are 169 m2 and 81 m2. the volume of the larger solid is 124.92 m3. which proportion corr
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By finding the scale factor, we will see that the volume of the smaller solid is 86.75 m³.

<h3>How to get the volume of the smaller solid?</h3>

If the solids are similar, then there is a scale factor between the two. Then the relation between the areas is equal to the scale factor squared, and the relation between the volumes is equal to the scale factor cubed.

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