We will define the following variables to solve the problem:
s: normal speed
t: normal time
We write the following system of equations:
6 = s * t
6 = (s + 3) * (t-7)
Rewriting the equation two we have:
6 = s * t -7s + 3t -21
Substituting:
s = 6 / t
6 = (6 / t) * t -7 (6 / t) + 3t -21
Multiplying both sides by t:
6t = 6t - 42 + 3t ^ 2 - 21t
Rewriting:
3t ^ 2 - 21t - 42 = 0
We take the positive root:
t = 7/2 + root (105) / 2
t = 8.62 h
We look for the value of the speed:
s = 6 / t
s = 6 / 8.62
s = 0.696 km / h
Answer:
she did travel 0.696 kilometers per hour
Answer: your the imposter you killed red then vented in admin
Step-by-step explanation:
Answer: 864 square inches (choice A)
Work Shown:
area = length*width
area = 36*24
area = 864
Answer:
g(x) = -x² - 4
Step-by-step explanation:
In this case, we are only changing <em>a </em>(reflection and vertical shrink/stretch) and <em>k </em>(vertical movement)
<em>k </em>= -4 because we are moving 4 units down
<em>a </em>= -1 because we are just reflecting over the x-axis
Answer:
C. 2
Step-by-step explanation:
Cohen's d is a parameter used to express the standardised difference between two means. It is defined as the difference between the means divided by the pooled standard deviation.
In this case, the difference between both means (M2-M1) is 8. As for the pooled standard deviation, simply take the square root of the given pooled variance:

Therefore, the value of Cohen's d (d) is:
