(x+2)^2 over x+2
x^2+4 \x+2
x+2
2.75 is 110%
2.75/1.1=2.50
Therefore, the main bill was two and a half dollars
9514 1404 393
Answer:
- 6 # plastic bricks
- 4 # wooden blocks
Step-by-step explanation:
Let p represent the number of pounds of plastic bricks in the mix. Then the number of pounds of wooden blocks is (10-p), and the total cost is ...
10p +5(10-p) = 80
5p = 30 . . . . . . . . . subtract 50
p = 6 . . . . divide by 5; there are 6 pounds of plastic bricks in the mix
4 pounds of wooden blocks and 6 pounds of plastic bricks should be used to make a 10-lb mix worth $80.
It's pretty clear what the pattern is - 2^(k-1) * (-1)^(k-1) would work backwards, but we have to work forwards to get lower in this case, so we could start at -3 (as long as we put the k-1 in absolute value to make sure it's not 1/8), so we could write it as ∑ (k=1, goes to 4) 2^(|k-4|)*(-1)^(k-4)
It doesn't matter for k-4 because 1/-1 and 1/1 are the same thing as -1 and 1 respectively
Answer:
The difference between the smallest and largest values in the tutored students’ data was 10 students.
Step-by-step explanation:
We are given that a tutor kept track of how many students she had helped every week for a year. The range of the number of tutored students was 10 students.
As we know that the range tells us the difference between the highest and the lowest value in our data set.
In this question, it is stated that a tutor helps a certain number of students every week in a year. So, there must be a week in which she helps the maximum number of students and there must be a week in which she helps the minimum number of students.
Range = Highest value - Lowest value
Hence, the difference between the smallest and largest values in the tutored students’ data was 10 students. This is the best interpretation of this value.
