6. how many odd positive integers less than 300 can be written using
the numbers 2, 4, 5, and 8?

5

Step-by-step explanation:

25, 45, 85, 245, 285

3 digit numbers must start with 2 as anything else would be more than 300

All numbers must end with 5 as that is the only odd number.

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.

step-by-step explanation:

to find if any function is an inverse of the other, put the first equation in as x in the next one. then simplify and solve. if at the end you get the statement y = x, then it is an inverse. if you get anything else, it is not.