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svet-max [94.6K]
3 years ago
5

Evaluate each expression

Mathematics
1 answer:
aliina [53]3 years ago
5 0
I’m only in 7 grade I don’t know how to do it
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26. 50 students sit in a class room. Each student
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<h2><em>each student requires 9m² of floor  </em></h2><h2><em>and given the no. of students is 50 </em></h2><h2><em>So the total area of the room is 9m²X50=450m² </em></h2><h2><em>Given the length of the room is 25m </em></h2><h2><em>so the Breadth is =450/25=18m </em></h2><h2><em> </em></h2><h2><em>each student requires 108m³ of space  </em></h2><h2><em>so total volume of the room is 108X50=5400m³ </em></h2><h2><em>we know that : Volume=Area X h </em></h2><h2><em>                      so⇒5400=450Xh </em></h2><h2><em>                          ⇒h=5400/450=  12m</em></h2><h2><em /></h2><h2><em>HOPE IT HELPS (◕‿◕✿)</em></h2>
8 0
3 years ago
What is 3/8 divided by 4/5?
vovikov84 [41]
3/8 divided by 4/5 is the same as 3 * 5 / 8 * 4 = 15/32 or 0.46875
4 0
3 years ago
The perimeter of a rectangle is 30 cm and its length is x cm. Find its area in terms of x. step by step explanation.​
mars1129 [50]

Answer:

The area of the rectangle in terms of 'x' = 13x

Step-by-step explanation:

  • Perimeter = 30 cm
  • Length = x cm

Using the perimeter formula to find the width w.

P=2(l+w)

P = 2l + 2w

2w = P-2l

Dividing both sides by 2

w\:=\:\frac{P}{2}-2

as P = 30 cm

w\:=\:\frac{30}{2}-2

w\:=\:15-2

w = 13 cm

Using the formula of the rectangle area

A = wl

substitute w = 13 and l = x in the formula

A=13\times \:x

A = 13x

Therefore, the area of the rectangle in terms of 'x' = 13x

7 0
3 years ago
How do you put x=y-1 <br> into word form
77julia77 [94]

Answer:

x equals y minus one

Step-by-step explanation:

= means equals

- is minus

x and y cannot be put into any other (word) form

hope this helps:)

4 0
2 years ago
Divide (8.6 x 108) by (3.2 x 103). express your answer in scientific notation
spin [16.1K]
(8.6 x 108) x (3.2 x103

place them in order

(8.6 x  3.2)  x (108 x 103)
 
27.52 x (108 x 103)

27.52 x 11124

 That is your answer to this question.
7 0
3 years ago
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