Answer:
-3x+2
Step-by-step explanation:
Since it's addition you just combine all like terms so,
5x+4
-8x-2
= -3x+2
The volume of a prism is found by : the area of the base which in this exercise is a rectangle • (times) the height.
Area of the base :
3•10=30 m^
The volume of the prism is :
30m^ • 7m = 210 in cubic metres
Because like terms you add or subtract together to make it easier to do the problem. just like you do with whole numbers. you add an subtract to make the answer simpler.
On expanded form is for example 139 in expanded form would be (100)+(30)+(9)and area model is the model for multiplication
