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Vlad [161]
3 years ago
11

This is 22 points

Mathematics
2 answers:
Reptile [31]3 years ago
6 0

Answer: There are 112 students left.

Step-by-step explanation: let the original number of students be 100 out of which 40 were girls. Additional 15 girls came making a total of 115 students out of which 55 are girls.

But we're told that the number of girls left is 52 not 55 so it means 3 girls left the dance, this reducing the total number of students from 115 to 112.

I believe this is clear enough.

The above solution is correct if the figures 40, 52, and 15 are taken as numbers NoT percentage. That was my error. I'm so sorry!

AURORKA [14]3 years ago
4 0
Let the initial number of girls be x, this represents 40% of the dancers.
Total number of dancers will therefore be:
100/40*x=2.5x
When 15 more girls joined, the new number of girls was:
x+15 this represents the total percentage of 52%. The new number of dancers became:
2.5x+15:
therefore the new percentage of girls can be expressed as follows:
(new number of girls)/(new number of dancers)×100
(x+15)/(2.5x+15)×100=52
(x+15)/(2.5x+15)=0.52
x+15=0.52(2.5x+15)
x+15=1.3x+7.8
15-7.8=1.3x-x
7.2=0.3x
x=7.2/0.3=24
The number of students after additional number of girls will be:
2.5x+15
=2.5×24+15
=60+15
=75 students

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nikitadnepr [17]

Answer: first choice

Step-by-step explanation

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Divide by t

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6 0
3 years ago
If you invest a penny on Jan 1, 1776 at 10% interest compounded daily, how much would you have on Jan 1, 2011?
pentagon [3]
I'm not sure if this is the right answer, but here goes nothing.  To find the amount of money you would make in one day, you have to multiply 1.10 times 1 penny (because you want to add .10 AND the penny) then you multiply that by 365 for how much you make in a year which is 401.5 then multiply that by 35 years, and you get 14052.5.  Sorry if that's wrong!  Good luck! 
4 0
3 years ago
Read 2 more answers
Show your working please.​
iren2701 [21]

Offer B is the best value for money because each kg cost is £0.61 and in offer 'A' each kg cost is £0.7.

<h3>What is a fraction?</h3>

Fraction number consists of two parts, one is the top of the fraction number which is called the numerator and the second is the bottom of the fraction number which is called the denominator.

We have:
2 bags for £35

2 bags means 50 kg (2×25)

Each kg cost = 35/50 = £0.7 per kg

3 bags for £92.50

3 bags means 150 kg

Each kg cost = 92.50/150 = £0.61 per kg

As we can see, offer B has a low cost per kg

Thus, offer B is the best value for money because each kg cost is £0.61 and in offer 'A' each kg cost is £0.7.

Learn more about the fraction here:

brainly.com/question/1301963

#SPJ1

6 0
2 years ago
the length of a rectangular sing is 5 time its width. if the sign perimeter is 24 inches. what is the sign area ?
kumpel [21]

Answer:

20 in²

Step-by-step explanation:

Assuming that the width of the sign is x, then from the question, we're told that the length is 5 times it's width, so

b = x inches

l = 5x inches

Again, we're told that the perimeter of the sign is 24 inches, and we know already that the perimeter of a rectangle is given as

Perimeter = 2(l + b), substituting this, we have

24 = 2(5x + x)

24 = 10x + 2x

24 = 12x

x = 24 / 12

x = 2 inches.

Since x is the width of the rectangle, and it's 2 inches, we use it to find the length of the sign.

l = 5 * 2

l = 10 inches.

Then, we are asked to find the area of the sign. Area of a rectangle is given as

A = l * b, so if we substitute, we have

Area = 10 * 2

Area = 20 square inches

8 0
3 years ago
If i weigh 210 and i need to loose 5 pounds a month in 6 months what is my end weight
maw [93]
That would be 180 cuz you lose a total of 5 pounds per 6 months so30 pounds. Then 210 minus 30 is 180
8 0
3 years ago
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