After eating at your favorite restaurant you know that the bill before tax is $52.60 and that the sales tax rate is 8%. You decide to leave a 20% tip for the waiter based on the pretax amount. How much should you leave for the waiter? How much will the total bill be including tax and tip.

$67.33 is the total bill including tax and tip.

Step-by-step explanation:

Cost of Bill before tax = $52.60

Sales tax rate at 8% = 8/100 × 52.60= $4.21

20% tip based on the pretax amount = 20% of the cost of bill before tax

= 20/100 × 52.60= $10.52

The amount to be left as tip for the waiter, at 20% is $10.52.

Total bill including tax and tip, to get this, we sum the cost of bill before tax, the 8% sales tax and the 20% tip

= $52.60 + $4.21 + $10.52

= $67.33

I hope this helps.

the answer is (2x+8)²= 16