11. all services at the salon are 25% off today. maria decided to get a haircut that originally costs $22. a. what would her total bill be with the discount? b. now she needs to leave a 20% tip. how much should she leave?

A. $22 x .25 = $5.50

$22 - $5.50 = $16.50

B. $16.50 x .20 = $3.30

So for part (A) you will look at the total amount of the haircut which is $22.00 and the discount of 0.25%.

The math there will be asking "what is 25 % of 22" (the answer is $5.50). You can also figure it out by doing 22.00 * 0.25 (this is will still come out to be $5.50). So the total bill with the discount will be ($16.50). How to get that is you will take $22.00 - $5.50 ($16.50 hair cut with the discount).

Now she is going to leave a tip, now remember, her current total is $16.50 because she got a discount. So you will follow the same math, 20% of $16.50 is $3.30. In this case you will add, $16.50 + $3.30 = $19.80. So her final amount is going to be $19.80.

A - $16.50

B - $19.80

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15