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Nina [5.8K]
3 years ago
6

I need help, im a single dad construction worker from los angeles, my daughter is a very smart person. Im having trouble correct

ing a wrong answer in math. She goes to Kumon academy for math and reading, but this problem im out of words

Mathematics
1 answer:
Deffense [45]3 years ago
6 0

Answer:

B=210

C=450

Step-by-step explanation:

Since you are asking for number 8, let's work with that problem :)

Firstly, we have to know we have rectangles here, and the area of a rectangle is given by the following formula:

A_{rectangle}=(width)(height)

So, in this problem we are given as an example the rectangle A, with witdth 90 and height 30. So, its area is:

A=(90)(30)=2700

The same happens with the small rectangle B:

B=(7)(5)=35

And, we have to do the same with rectangles B and C:

<u>Rectangle B:</u>

Width:7

Height:30

B=(7)(30)=210

<u>Rectangle C:</u>

Width:90

Height:5

B=(90)(5)=450

If we sum A, B, C and D the result must be equal to the total are of the big rectangle:

A+B+C+D=2700+210+450+35=3395

Area of big rectangle with width 90+7=97 and height 30+5=35:

(97)(35)=3395

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