Answer:
I think it is C
Step-by-step explanation:
Forgive me if I am wrong the reason I think so is I did one like this last week. Sorry if it is wrong trying to remember.
Answer:
5
Step-by-step explanation:
Answer:
330
Step-by-step explanation:
6x²+4x+8
Let x=7
6 ( 7)^2 + 4(7) +8
6*49+ 28+8
294+28+8
330
Let <em>y</em> be the expression you want to differentiate:
Now,
Use the chain rule to differentiate both sides with respect to <em>x</em> :
Solve for d<em>y</em>/d<em>x</em> :
First, list all the given information:
*100 miles/week
*25 miles/gallon
*$4/gallon
*weekly expenditure reduced by $5
The easiest approach to use here is the dimensional analysis. Cancel out like units if they appear both in the numerator and denominator side. Solve first the original cost. The solution is as follows:
100 miles/week * 1 gal/25 miles * $4/gal = $16/week
The reduced cost would be:
16 - 5 = (New average miles/week) * 1 gal/25 miles * $4/gal
New average miles/week = 68.75 miles/week
