Answer:
1. 11 2. 8
Step-by-step explanation:
For number one to find the mean you would first count how many candy bars they have all together and then you would just divide by how many groups there are which since there's four people thats four groups in total they have 44 candy bars because 12+9+10+13=44 which if you divide that by 4 you get 11 as your mean.
For number two you would do the same thing count the total shoe sizes and you should get 40 and since there's 5 people which is five groups it would be 40/5 which means that the total mean would be 8.
Answer:
The easiest way to work out average times is to convert them all to seconds. 60 secs makes 1 min etc. Add all the seconds. Then divide the sum by the number of entries, hope this works.
Step-by-step explanation:
Answer: a=19
Step-by-step explanation: In order to solve this question, we must first take out the parenthesis, we can do this by taking 1/3 and multiply it by a and 5. This will give us 8=1/3a+5/3, with this we can subtract 5/3 on both sides of the equation, which will then give us, 19/3=1/3a. Last, we can divide 19/3 by 1/3 giving us 19 as our final anwser. a=19
It will cost $45 to go 360 miles :) I hope this helped and if it does mark me brainliest!
Answer: the third option m(x) = - 7x
Justification:
1) For a function to have inverse function, the original function has to be one to one. This is for the original function two (or more) images cannot have different inputs. That condition is satisfied by the function m(x) = - 7x, since it is a straigh line.
2) the function b (x) = x^2 + 3 is a parabola. That means that, except by the vertex, every image is realated with two inputs.
For example, b(x) = 103 => x^2 = 103 - 3 = 100 => x = 10 and x = -10.
3) For the function d(x) = - 9, you cannot tell the input value for the image because it is the same image for any value of x.
4) The function p(x) = |x| also has a pair of images for the same value of x (excpet for the vertex).
For example, for x = - 100 and x = 100, p(x) = 100, so you cannot tell the x value given the p(x) value.