All categories

3 years ago

(a)

Mathematics

2 answers:

sweet [91]3 years ago

7 0

Answer:

620 is the number of boys in the school

Explanation:

1400 is the number of students in the school, since we know how many girls there are in the school then we can subtract the number of girls from how many total students are in the school. So you gotta subtract 780 from 1400 which is 620, the number of boys in the school.

BRAINLIEST ME PLSS:)

Vika [28.1K]3 years ago

3 0

Answer:

(a) Percentage of girls = 55 $\frac{5}{7}$

(b) Percentage of boys = 44 $\frac{2}{7}$

Step-by-step explanation:

To find percentage, we multiply the fraction out of the total by 100%.

Percentage of girls = $\frac{780}{1400}$ × 100%

= 55 $\frac{5}{7}$

Percentage of boys = $\frac{1400-780}{1400}$ × 100%

= 44 $\frac{2}{7}$

You might be interested in

PLEASE HELP WILL GIVE BRAINLIEST

7nadin3 [17]

So considering she’s using the Pythagorean Theorem, it implies that it’s a right triangle. In this case, a^2+b^2=c^2 is used to solve for any length. While “a” and “b” are interchangeable, c is always the hypotenuse. And as you may know, the hypotenuse is the longer side of the right triangle.

So now solve for it to be sure if it is in fact a right triangle.

8^2+15^2=17^2

64+225= 289

289=289

Which means B is the error made.

Hope this helps!

4 0

2 years ago

Roberto needs some roofing tiles to be cut from a large tile. How many tiles that are each 14 3/8 inches in length can he cut fr

ratelena [41]

Answer:

6 tiles.

Step-by-step explanation:

We have been given that Roberto needs some roofing tiles to be cut from a large tile.

Let us find the number of tiles that can be cut from a larger piece of tile.

$\text{Tiles can be cut from large piece}=\frac{\text{length of large tile}}{\text{length of each small tile}}$

Let us convert our given mixed fractions in improper fractions.

$14\frac{3}{8}=\frac{115}{8}$

$100\frac{3}{8}=\frac{803}{8}$

Now let us substitute our given values in above formula.

$\text{Tiles can be cut from large piece}=\frac{803}{8}\div\frac{115}{8}$

Since we know that dividing a fraction by a fraction is same as multiplying the reciprocal of second fraction with the first fraction.

$\text{Tiles can be cut from large piece}=\frac{803}{8}\times\frac{8}{115}$

Upon cancelling out 8 from numerator and denominator we will get,

$\text{Tiles can be cut from large piece}=\frac{803}{115}$

$\text{Tiles can be cut from large piece}=6.9826086956521739$

We can see that number of tiles turns out to be 6.98, although it is very close to 7, but we cannot round our answer because the 7th tile will still be shorter than the required measure. Therefore, we can only cut 6 tiles of the required size from the given large tile.

3 0

3 years ago

- If 2x2 + 8y = 121.5 and x2 - 8y = 121.5, then x =<br> 9<br> 6.36<br> 16<br> 7

Natalija [7]

Step-by-step explanation:

2x² + 8y = 121.5

x² - 8y = 121.5

Add the equations together to eliminate the y terms.

3x² = 243

x² = 81

x = 9

4 0

3 years ago

Geometry math question no Guessing and Please show work

irakobra [83]

Option C is the answer to your question!!
Hope this helps you!!

6 0

3 years ago

The cost of 2kg apples and 3 kg oranges is Rs. 120. [Take x and y as the cost per kg of apples and oranges respectively.]

stiv31 [10]

Step-by-step explanation:

2+3=120

5=120

=120

=24

apple=2 multiply 24 is 48

orange=3 multiply 24 is 72

6 0

1 year ago