Answer:
y=-5/2x+4
Step-by-step explanation:
find the slope by using y2-y1/x2-x1
-1-19/2-(-4)
simplify
-20/8
simplify
-5/2
use slope-intercept form, y=mx+b
since we know the slope, find b
plug in one of the ordered pairs into the equation
-1=(-5/2)(2)+b
simplify
-1= -10/2+b
simplify
-1=-5+b
add 5 to both sides
b=4
plug b into y=-5/2x+b
y=-5/2x+4
Answer:
Total revenue =
dollars
Step-by-step explanation:

Integrate with respect to
.
∫
dx
Take 
Differentiate with respect to 

So,
∫
Use integration by parts: ∫f g dx = f∫ g dx-∫(∫g dx)f' dx
Therefore,
∫
=
∫
Put 

To find total revenue from the sale of the first 12 calculators, put 

Total revenue =
dollars
False a rectangle could never be a square
Answer:
9
Step-by-step explanation:
according to the question
27×⅓
9