Answer:
D. 10x - 20
Step-by-step explanation:
The perimeter is the sum of all the sides of the rectangle.
Set up your equation. Because the opposite sides of the rectangle are equal, you add them twice or multiply it by 2.
P = 2(2x - 8) + 2(3x - 2)
Now distribute the 2 across the parentheses.
P = 4x - 16 + 6x - 4
Combine the variables.
P = 10x - 16 - 4
Combine the constants.
P = 10x - 20
Answer:
24 does not equal 21
Step-by-step explanation:
4×-3(×-2)=21
Distribute:
4*6=21
24 does not equal 21
Answer:
the unit cost per item
Step-by-step explanation:
The description of the graph tells you what the slope means. The slope is the (change in) y-value (cost) per (change in) x-value (item), thus is cost per item.
The slope of the line from the origin to a point is the average cost for that number of items. The slope of a tangent line at a point on the curve is the marginal cost for that number of items.
When the curve is linear and goes through the origin, the slope is the same everywhere and is the cost per item. (It is also the average cost and the marginal cost, where that is of interest.)