Answer:
Step-by-step explanation:
c
Answer: Your question options are not legible but the inverse of the function is f-1(x) = (x + 2) / 2
Step-by-step explanation:
y = 2x + 2
Make x the subject of formula:
2x = y - 2
x = (y - 2) / 2
Now substitute y for x:
(x - 2) / 2
Y = (x - 2) / 2 is the inverse equation of the above graph.
Answer:
Probability (A sum of 10)=0.1025
Step-by-step explanation:
To find the Probability the sum is 10, we can either have
i. a 4 and a 6
ii. a 5 and a 5
Pr (A AND B) = Pr (A) x Pr(B)
Pr (A OR B) = Pr (A) + Pr(B)
Probability (A sum of 10) = Pr(getting a 4 AND a 6) OR Pr(getting a 5 AND a 5)
=(0.25 x 0.25)+(0.20 x 0.20)
=0.0625+0.04
=0.1025
Answer:
Mean estimate is gotten by dividing total number of text messages for a month(or whichever period you choose, longer more accurate) by number of days in that month.
Step-by-step explanation:
-share questionnaires to students( 11th graders) at school daily asking how many messages they send per day. Collect immediately.
-do this for a month. This is to ensure they give less inaccurate answers.
-add up to get total value of text messages in a month
-divide this by number of days in the month
The number you get is the mean estimate of text messages sent by 11th graders per day(using a period of one month)
