In mark's class, there are 15 students with brown hair, 3 students with blonde hair, and 5 students

15 to 5
The ratio is 15 to 5 because 15 students have brown hair, and 5 have black hair making the fraction 15/5 then I add to instead of /. If you need to simplify reply and say you do.

3 : 1

Step-by-step explanation:

We know that the ratio of A to B is given by :-

[tex]\dfrac{A}{B}[/tex] or A : B .

Given : Number of students having brown hair = 15

Number of students having black hair = 5

Then , the ratio of students with brown hair to students with black hair will be  :-

[tex]=\dfrac{\text{No. of students with brown hair}}{\text{No. of students with black hair}}\\\\=\dfrac{15}{5}=\dfrac{3}{1}[/tex]

Hence, the ratio of students with brown hair to students with black hair = 3 : 1.

The length is 23 and y because you add them together

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4