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sertanlavr [38]
2 years ago
14

Set 2 Maths has 30 pupils in it.

Mathematics
1 answer:
Ierofanga [76]2 years ago
4 0
80/100 x 30 = 24 because you just multiply percents
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Explain why you might want to write very large and very small numbers like the ones in the example problem in scientific notatio
slava [35]

Answer:

Extremely large and small numbers that have many zeros are long to write and take up a lot of room. So, by using scientific notation a number can be written shorter. For example, numbers such as 295,000,000,000 can be shortened to 2.95x10^{11}. This is easier to write and understand. This is why the scientific notation is used over standard.

5 0
2 years ago
A rectangle has a perimeter 60m and base21 m what is its area
Komok [63]

Since you're given the base for the perimeter of the rectangle, you can solve this question quickly.

First, you multiply 21 by 2, because there are two bases to a rectangle.

You'll get 42, and you will have to do 60-42 to find the perimeter for the remaining two sides.

60-42 will give you 18, so you can divide that by 2 because there are two other sides, giving you 9.

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5 0
3 years ago
Help please! the question is in the picture below for reference when answering! thank you so much!
stepan [7]

Answer:

x = -1

Step-by-step explanation:

AB + BC = AC = 28

the way from A to C goes through B.

so, the total way of A to C is the sum of the way from A to B and then from B to C.

=>

(5x + 10) + (2x + 25) = 28

7x + 35 = 28

7x = -7

x = -1

4 0
3 years ago
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If an airplane travels 110 mph for 5 hours, what is the total distance traveled?
Sergeu [11.5K]

Answer:

550 miles

Step-by-step explanation:

Distance=Speed\times Time

Distance = 110mph \times 5h = 550\ miles

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Which of these ratios is NOT the same (not equivalent)? 12/4 12:3 4 to 1 24:6
Margaret [11]

The answer is A: 12/4.

5 0
3 years ago
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