48.125 just used the calculator
Answer:
Step-by-step explanation:
y=4x+2
x+2y=22
x+2(4x+2)=22
x+8x+4=22
9x+4=22
9x=18
x=2
y=4(2)+2
y=8+2
y=10
(x,y) -> (2,10)
Step-by-step explanation:
21)
Frog C - Frog B
318.5-199.25=119.25 cm
22)
Frog A = 213.33
to the nearest whole number= 213 cm
Answer:
f(320)= how much Dereck pays for phone service if he calls 320 minutes.
F(320)=0.11(320)+43=35.2+43=78.2
Answer: the value of f(320) is $78.2 and it will be the cost of phone service for 320 minutes of international calls.
Answer:

And we can set equal this derivate to 0 in order to find the critical point and we got:


And we can calculate the second derivate and we got:

So then w can conclude that the value of t = 3.4375 represent the minimum value for the function and we can replace in the original function and we got:

So then the minimum annual income occurs at t = 3.43 (between 2008 and 2009) and the value is 25.094
Step-by-step explanation:
For this case we have the following function:

Where P represent the annual net income for the period 2007-2011 and 
And t represent the time in years since the start of 2005
In order to find the lowet income we need to use the derivate, given by:

And we can set equal this derivate to 0 in order to find the critical point and we got:


And we can calculate the second derivate and we got:

So then w can conclude that the value of t = 3.4375 represent the minimum value for the function and we can replace in the original function and we got:

So then the minimum annual income occurs at t = 3.43 (between 2008 and 2009) and the value is 25.094