there is a ratio of 5 boys to 3 girls in the chorus. They are 24 boys in the chorus. How many girls are there?

2 answers:

7 0

Ok, so at first this question seems tricky, since 5 does not go into 25. However, you can't have a percentage of 1 person. Since 5 goes into 25 5 times, then we will go with that. So multiply 3 x 5 to get 15 girls. Because you can't have a fraction of a single person.

Kobotan [32]3 years ago

7 0

You have to use proportion for this problem, so you do

5 boys = 3 girls
24 boys = ? girls
24 times 3 equals 72. 72 divided by 5 equals 14.4. You have to round this answer to get 15 girls.
Hope this helped :D

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aleksandrvk [35]

Let's actually find the line of best fit...

m=(nΣyx-ΣyΣx)/(nΣx^2-ΣxΣx)

m=(11*836-130*55)/(11*385-3025)

m=2046/1210

m=93/55

b=(Σy-93Σx/55)/n

b=(55Σy-93Σx)/(55n)

b=(7150-5115)/(55*11)

b=185/55, so the line of best fit is:

y=(93x+185)/55

A) The approximate y-intercept (the value of y when x=0) is 185/55≈3.36.

Which means that those who do not practice at all will win about 3.36 times

B) y(13)=(93x+185)/55

y(13)≈25.34

So after 13 months of practice one would expect to win about 25.34 times.

3 0

3 years ago

The table below represents a linear function.

ohaa [14]

(-1,5)(1,9)
slope = (9 - 5) / (1 - (-1) = 4 / (1 + 1) = 4/2 = 2

y = mx + b
slope(m) = 2
use any of ur points in the table....(1,9)...x = 1 and y = 9
now we sub ad find b, the y int
9 = 2(1) + b
9 = 2 + b
9 - 2 = b
7 = b

so ur equation of the table is : y = 2x + 7.....where the slope = 2 and the y intercept = 7

so, the equation with the greater slope and the greater y int is :
y = 3x + 7.5....this has a slope of 3 and a y int of 7.5

8 0

3 years ago

What would Y be equal to in the problem 0.5x + 0.6y = 5.4

Alla [95]

Answer:

y = - $\frac{5}{6}$ x + 9