A printer takes 2 and a half seconds to print a flyer. It took 75 secons to print a batch of flyers with out stopeding. How many flayers are in a batch

30 flyers

Step-by-step explanation:

A printer prints:

1 flyer = 2 1/2 seconds = 2.5 seconds

1 batch of flyers = 75 seconds

The number of flyers in a batch is:

2.5 seconds = 1 flyer

75 seconds = x

Cross Multiply

2.5 × x = 75 × 1

x = 75/2.5

x = 30 flyers.

Therefore, the number of flyers in a batch is 30 flyers

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