The painter needs at least two gallons of paint to cover the wall.
To get this answer, you first need to find the area of the wall; by multiplying 20.5 x 16.4. This will get you 336.2.
Then, you need to divide 336.2 by 200. This will get you approx. 1.6.
If it's asking for partial gallons as well, stop here. Your answer is 1.6.
If not, continue.
Unless you're including partial gallons, you can't get 1.6 gallons of paint, so you need to round up. This will be 2 gallons.
98.66074, you just multiply the two values
(-3,7)
5(-3)+2(7)=-1
-15+14=-1
The answer is Infinate Solutions I believe we are working on these types of equations in school rn
A △ Has to have 180º so 72+56 b would have to be appx. 52degrres