Diane is mailing packages. each small pack package costs her $2.10 to send. each large package cost her $3.90.how much will it cost her to send 1 small package and 5 large package

First, organize your variables:

Let x= the number of small packages and y=the number of large packages. C= the cost of sending the packages.

Set up your equation:

2.10x+3.90y=C

Substitute 1 and 5 for x and y since that's how many packages Diane wants to mail, and then solve for C

2.10(1)+3.90(5)=C

2.10+19.50=C

21.60=C

It will cost Diane $21.60

constants mean the stopped points or the points on a graph that nothing is changing, hope this

step-by-step explanation:

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