The slope of the line is 4/10
remember: rise over run
Commutative, because no matter how you group the equation you will still get to same answer
C is about 55 a is about 95. Step by step explanation:
An object in geometry with no width, length or height is a point
Let x be the cost of dryer, y be the cost of washer
x + y =821
x-79 = y
combine 2 equation
we got
x + (x-79) = 821
2x + 79 = 821
2x = 742
x=471
The cost of dryer is $471