He ratio of girls to boys in a a bicycling club was 3 : 5. there were 50 boys. how manytotal members were there in the club

80

Step-by-step explanation:

Given

Girls : Boys ==> 3 : 5

number of boys as a fraction of total members,

Boys = 5/ (3+5) = 5/8

It is given that there were 50 boys.

hence

5/8 ---> represents 50 members (i.e boys)

1/8 ---> represents 50/5 = 10 members

8/8 > represents 10 x 8 = 80 members

5x + 3y = - 4

step-by-step explanation:

the equation of a line in standard form is

ax + by = c ( a is a positive integer and b, c are integers )

express the line first of all in slope- intercept form

y = mx + c ( m is the slope and c the y-intercept )

to calculate m use the gradient formula

m = ( y₂ - y₁ ) / ( x₂ - x₁ )

with (x₁, y₁ ) = (7, - 3) and (x₂, y₂ ) = (4, - 8)

m = = -

y = - x + c ← is the partial equation

to find c substitute either of the 2 points into the partial equation

using (4, - 8 ), then

- 8 = - + c ⇒ c = -

y = - x - ← in slope-intercept form

multiply all terms by 3 to eliminate the fractions

3y = - 5x - 4 ( add 5x to both sides )

5x + 3y = - 4 ← in standard form