Answer:
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Explanation:
r = number of red pens
4r = cost of buying r red pens
example: if r = 10, then 4r = 4*10 = 40 is the total cost of buying 10 red pens
If John buys r red pens, then he must buy 20-r black pens so that r and 20-r add to 20.
John buys 20-r black pens, and at $5 each, so it will cost 5(20-r) dollars for just the black pens alone.
In total, John spends 4r + 5(20-r) dollars for all the pens (red & black)
We want $92 be the most he spends. This is the ceiling or highest value possible.
Therefore,
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Extra info:
If you want to solve for r, then
distribute
add r to both sides
subtract 92 from both sides
So John must buy at least 8 red pens. The most he can buy is 20 red pens since he wants 20 pens total.
No because if it did it would not be a function at all
Answer:
Step-by-step explanation:
3 1/7 = 3.142857
3 10/71 = 3.140845
Actual value of pi = 3.14159 to 5 decimal places.
The actual value of pi is larger than 3.140845
The actual value of pi is smaller than 3.142857.
Note the key word is between
3.1408 < pi < 3.142857
When I taught school, I tried to impress upon my students that the counting systems of the ancients was so crude that it was a miracle they could come up with any kind of estimate especially one like 3 and 10/71.
There is mention of pi in the Bible (somewhere in 2nd Kings). It gives a value of 3. You make think that is a pretty poor estimate. but if you knew how the counting system worked, you'd be impressed by how good the answer was. The history of man is one of baby steps until now when we are making giant strides in almost every field that involves numbers. Any mysteries have multiplied by just as much.
The answer is A. 25%
the reason for this answer is to find the percentage, u must divide 100/80 and u get 1.25
the one represents the 100% and the .25 represents 25%
hope this helps!
First you need to input your variables.
5/9-(-1)=x
following the order of operations, you need to divide first.
5/9 is going to be the smallest fraction you can get so you move on to subtracting. knowing that subtracting a negative number acts as adding that number as a positive.
5/9+1= 1 5/9 as a mixed fraction which is the simplest form.