Discriminant b^2-4ac = (-9)^2 - 4*2*9 = 9
so there are 2 roots
because of the -9x and 9 they will both be positive
Answer:
Trey lives 384 feet.
Step-by-step explanation:
Let the average rate be represented by s, and the distance by d.
speed =
⇒ distance = speed x time
i.e d = s x t
On his first trip,
d = s x 8
d = 8s ............ 1
on his trip home, the average rate was 16 miles per hour faster, so that;
d = (s + 16) x 6
d = 6s + 96 ............ 2
Equation 1 and 2, we have;
8s = 6s + 96
8s - 6s = 96
2s = 96
s = 48
The average rate is 48 miles per hour.
Thus from equation 1 (also equation 2 can be used),
d = 48 x 8
= 384
Therefore, Trey lives 384 feet from the mountains.
Answer:
B. 10 + 4x ≤ 200
Step-by-step explanation:
Answer:
Step-by-step explanation:
Acceleration (a) is the change in velocity (Δv) divided by the change in time (Δt).
1. Acceleration at Point B
2. Acceleration at Point C
Solution
We are given two ranks
First, in 2018, rank of 145 out of 435 students
Secondly, in 2019, rank of 160 out of 404 students.
(A) In which year did you have the higher percentile ranking?
To answer this, we need to calculate the percentiles for the two rankings and comapre them
By comapring the percentile ranking, we realize that year 2019 has higher percentile (39.6%) comapred to year 2018 (33.33%)
(B)
If you had the data on the cumulative GPA of each student at the end of the spring semester in 2018, what would the mean and the median each tell you and how would you compute each measure?
The mean and the median tells us about the measure of the center of the dataset
To compute the mean, we us the formula