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1. 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 = [tex]\frac{-8+3}{4-7}[/tex] = - [tex]\frac{5}{3}[/tex]

   y = - [tex]\frac{5}{3}[/tex] x + c ← is the partial equation

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

   using (4, - 8 ), then

   - 8 = - [tex]\frac{20}{3}[/tex] + c ⇒ c = - [tex]\frac{4}{3}[/tex]

   y = - [tex]\frac{5}{3}[/tex] x - [tex]\frac{4}{3}[/tex] ← 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

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2. The answer is a 5/20 because if u add all of the marbles there are 20 and there are 5 red marbles so 5/20 is the answer mark as brainliest

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3. #15. square

   step-by-step explanation:

   because quadrilatural (idk how to spell it) means somthing that is not 3d or like, equal sides (or somthing like that   you know what i meanz)

   hope this halps!

   bai!

   [tex]15points! show your work! any answers ![/tex]

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4. the answer is the third / last answer

   step-by-step explanation:

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