Answer:
$64.44
Step-by-step explanation:
To find the amount for the tip, multiply $53.70 by 20%.
First, change 20% to a decimal by moving the decimal left two places, or dividing 20 by 100.
20% = 0.2 as a decimal
Now you can multiply to find the tip.
$53.70 x 0.2 = $10.74
Finally, add the tip to the amount of the bill.
$53.70 + $10.74 = $64.44
comparison
X ≥ 3.5
-2x-6≤1
+6 +6
-2x≤7
-2x/2 7/2
x ≥ 3.5