I’m having a lot of trouble on this and could use because i was absent when we learned this? !

21, 35

Step-by-step explanation:

So you take 3.14 for Pi/π

And you circumference is 65.94

You know that circumference = Pi*Diameter

So you go backwards which is

65.94/3.14

= 21

Ending up with your diameter being 21

Next circumference is 109.9, so you do the same thing going backwards.

109.9/3.14

= 35

So your diameter is 35

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

what is the rest of the question? ?