Answer:
= 16+49 = 65
Step-by-step explanation:
The error is at the end of the first line. (-7i)(7i) = -49i² ≠ +49i².
The correct work is ...
(4-7i)(4+7i)=16+28i-28i-49i^2
= 16+49
= 65
Answer:
Explanation:
<u>1. Model:</u>
i) Profit = Revenue - Cost
ii) Revenue = price × number of items
iv) Cost = variable cost + fixed expense
<u>2. Solution</u>
i) Revenue = $ 57 / item × 419 items
ii) Cost = $ 23 / item × 419 items + $5,984
iii) Profit = $ 57×419 - ($23×419 + $5,985)
Profit = $ 23,883 - ($ 9637 + $ 5,984) = $ 23,883 - $ 15,621
Profit = $ 8,262 ← answer
Answer:
A
Step-by-step explanation:
This is how I write
y=kx+m
but I have seen some write it like this:
y=mx+b
Well both of them are the same thing, I'll use the first one because I'm more comfortable with it.
y=kx+m
To find out what k
So you first need to choose two points.
I'll go for (0,-5) and (2,0)
Now you could insert k into the equation and it will look like this.
To find out what m is just pick one point and insert it into the equation. So if I pick (0,-5). 0=X therefore it should be replaced by x and -5=y therefore it should also be replaced by y.
m=-5
Try it with another point to see if you get the same answer. this time I'll pick (-6,10)
m= -5
The equation will be y=-5/2x-5)