8. It used to be standard to leave a tip of 15% on the total of a bill that you get at a restaurant. This is more challenging than a 10% or 20% tip but can still be done using our 10% shortcut.
Find the tip you should leave on each of these totals. Show your calculations.
(a) Total bill of $40.00
(b) Total bill of $68.00

y > 1/3x

y < = -x + 4

hope this : )

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

14

step-by-step explanation:

answer: can you give the

step-by-step explanation: