Answer:
60
Step-by-step explanation:
10 + 5 = 15. 15/2 is 7.5. 7.5 times 8 is 60. The formula for the area of the trapezoid is (a+b)/2 x h.
300
find the sum of area of all sides
<em>x</em> = Total meal cost
<em>y</em> = Total cost-plus tip
113% * <em>x</em> = <em>y</em>
336
12
Start at negative 8 on the number line than move to positive 20
