Sally is saving money to buy a new computer. the computer costs $689. she has saved $125, and each week she adds $25 to her savings. assuming that she deposits her money once a week, how many weeks will it take her to save enough money to buy the computer?

23 because you also subtract the amount of weeks you already saved up

Step-by-step explanation:

if you want ecxactness 689 divided by 25 is

or if you want approxiamte i rounded 689 up to 700 because we want to know how many weeks and we will have passed 689 so yeah.

Then i divided 700 by 25 and i got 28

then subtract 125 from 700 and you get 675 ND THEN DIVIDE THAT BY 25 and you get 23

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.

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