Niles bought 4 packs of baseball cards. he also spent $14 for a notebook to hold the baseball cards. he spent a total of $23. niles wrote and solved the equation 4x + 14 = 23 to find the cost of each pack of baseball cards. which of the following is true?

a. niles could subtract 14 from 23 to find the cost of each pack of baseball cards.
b. niles could divide 14 by 4 to find the cost of each pack of baseball cards.
c. niles cannot use arithmetic to find the cost of each pack of baseball cards.
d. niles spent $2.25 on each pack of baseball cards.

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

easy its decreasing

step-by-step explanation:

because its top point is at the to of the graph on the left side (atleast from the veiw i see it) now if that top point wast in the lower part of the graph it would be increasing hope this have a nice day