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drek231 [11]
3 years ago
9

There are

Mathematics
1 answer:
Andrew [12]3 years ago
8 0

Answer:

40%

Step-by-step explanation:

If there are 1200 students in the school and 720 of them are boys that means 480 of them are girls.

I like to do cross multiply and divide so the equation for that would be  480/120 = ?/100

if you cross and multiply 480 by 100 you will get 48000 then if you divide that by 1200 you will get 40 as your missing value.

Im basically just saying 480/1200 = 40%

If you need further help there are plenty of you tube videos on how to cross  multiply and divide

Hope this helps

- Please mark brainliest :)

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The sides of a triangle are 3 consecutive odd integers and the shortest side is 20% of the perimeter of the triangle. What is th
AysviL [449]

Answer:

15 units

Step-by-step explanation:

The terms of an odd integer are given by 2n - 1. Since the sides of the triangle are three consecutive odd integers, let them be 2n - 1, 2(n + 1) - 1 and 2(n + 2) - 1 respectively, where 2n - 1 is the shortest side

Let P = perimeter of triangle = 2n - 1 + 2(n + 1) - 1 + 2(n + 2) - 1

= 2n - 1 + 2n + 2 - 1 + 2n + 4 - 1

= 2n - 1 + 2n + 1 + 2n + 3

= 2n + 2n + 2n - 1 + 1 + 3

= 6n + 3

Since the shortest side is 20% of the perimeter of the triangle, we have that

2n - 1 = 20%(6n + 3)

2n - 1 = 0.2(6n + 3)

expanding the bracket, we have

2n - 1 = 1.2n + 0.6

subtracting -1.2n and adding +1 to both sides, we have

2n - 1.2n = 1 + 0.6

0.8n = 1.6

dividing both sides by 0.8, we have

n = 1.6/0.8

n = 2

Since P = 6n + 3, substituting n = 2, we have

P = 6(2) + 3 = 12 + 3 = 15 units

3 0
3 years ago
Each side of the first figure is one unit copy and complete the table then find the function rule for the relationship between t
sergij07 [2.7K]
Perimeter of a shape is the total length of its border

Figure 1, perimeter = 5 units
Figure 2, perimeter = 7 units
Figure 3, perimeter = 9 units
Figure 4, perimeter  = 11 units

Notice that the perimeter is forming an Arithmetic sequence; 5, 7, 9, 11 with a common difference of 2

The general form of an Arithmetic sequence is 

n_{th}term=dn+0^{th}term

Where 'd' is a common difference and 'n' is the number of terms.

We have d = 2, and
zero term = the term before the first term = 3

n_{th}term=2n+3 ⇒ This is the rule to find the perimeter of the next figures

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4 years ago
How many pints are in 2 quarts
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There are 4 pints because 1 quart equals to 2 pints.... i think u can figure out why

4 0
3 years ago
Read 2 more answers
4x+3y=-6 standard to slope intercept form
miss Akunina [59]

Answer:

y = -4/3x -2

Step-by-step explanation:

Slope intercept for is y = mx+b where m is the slope and b is the y intercept

4x+3y=-6

We need to solve for y

Subtract 4x from each side

4x-4x+3y=-4x-6

3y = -4x-6

Divide each side by 3

3y/3 = -4x/3 -6/3

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5 0
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Can somebody please help me! i’m failing!
Art [367]

Answer:  Side AB= -7/4

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