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nikklg [1K]
4 years ago
5

A rectangle has a perimeter of 20m express the area

Mathematics
1 answer:
OLga [1]4 years ago
5 0
Because the perimeter is 20m, the short sides of the rectangle can be 2m and the long sides are 8m (since 2m + 2m + 8m + 8m = 20m)

And since we figured out 2 of the side lengths (2 and 8), we can figure out the area

2 x 8 = 16

Therefore, the area is 16m

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Sandra used partial products to find the product of 438 × 17 by multiplying 438 by 1 and 438 by 7 to get 3,066. Find the product
boyakko [2]

Let us determine the product of 438 and 17 by partial products.

Consider 438 = 400+30+8

and 17 = 10+7

So, 438 \times 17 = (400+30+8) \times (10+7)

438 \times 17 = (400\times 10)+(30 \times 10)+(8 \times 10) +(400 \times 7)+(30 \times 7)+(8 \times 7)

= 438 \times 17 = (4000+300+80+2800+210+56)

= 7446

Therefore, the product of 438 and 17 is 7446.

No, Sandra's answer is not correct.

Because she should have expressed 17 as (10+7), then if she multiplied (438 by 10) and (438 by 7). And, then added the results.Then her answer would be correct.

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3 years ago
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3 years ago
How do I turn -6.3 into a fraction?
evablogger [386]
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3 years ago
15. Mr Muthu bought some apples and oranges. The price of the fruits were as shown below. Fruit Price Apples 60¢ each Oranges 80
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