MATHEMATICS MIDDLE SCHOOL

The area of a rectangular playground is 420 sq.m, If the length is increased by 7 and breadth is decreased by 5, the area of the rectangular playground remains the same, find the length and breadth of the rectangular playground.​

Answers

Answer 1
Answer:

Area = 420 sq m

length x breadth = 420

(l + 7)(b -5) = 420

lb = (l+7)(b-5)

lb = lb - 5l + 7b - 35

-5l + 7b - 35 = lb - lb

7b - 5l = 35

7b = 35 + 5l

b = (35 + 5l)/(7) = 5 + (5l)/(7)m

-5l = 35 - 7b

l =  (7b-35)/(5) = (7b)/(5)- 7 m

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A.) meters
B.) Kilometers
C.) Centimeters
D.) Millimeters.

Answers

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This is because the thickness of a quarter is very small and thus bigger units such as meters and kilometers will not be convenient. Centimeters is the best unit.

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Answers

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If this helped smash that thanks button

Subtract. –56 – (–27.07)

A.
–83.07

B.
–28.93

C.
28.93

D.
83.07

Answers

to solve -56 - (-27.07)  we have to remember that a negative sign in front of another negative sign  will change the sign to a positive and -(-27.07)=27.07
-56+27.07=- 28.93
YOUR CHOICE IS B
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What is the area of this regular polygon?

Answers

OK so your answer is A your welcome

FIRST TO HELP ME WILL GET Brainleyist!!! Find the perimeter of the parallelogram,

A. 15.9ft
B. 24.84ft
C. 31.8ft
D. 11.73ft​

Answers

Answer:

C. 31.8ft

Step-by-step explanation:

Perimeter of a parallelogram is calculated by this formula P = 2(a+b) (b: base, a: side)

The base given here is 10.8 ft and side is 5.1 ft

2 × (5.1+10.8) = 31.8 ft

Answer:

B) 24.84.

Step-by-step explanation:

Its hard to explain but ===>

First do Pythagorean theorem with 2.3 and 5.1.

You will need to do two thing with that answer.

First subtract it from the 10.8.  That will be used for later.

Also, multiply it by 2.3 that is for the triangles that are on the sides.

Next you will want to take the number you set aside and multiply it by 2.3.

Finally add and you will have your answer.

Estimate the quotient of 72+ 5.8. A 9 B 1 1 C 12 D 14

Answers

well your dividing so it would be 12 i got 72/5.8=12.41..that 4 behind it means that it stays 12
The answer is C if u divide u get 12.41 so if u look to the right u see it is 4 so u just put 0 is it's 5 or more than u make it 13 so the answer is 12
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