There are many ways you can write a ratio. They're all basically the same thing, though. 5:9, 5 to 9, and 5/9 (which is a fraction) are all just different ways to write ratios.
I think they made 9 5/6sandwiches
7 1/2= 7 3/6
2 1/3=2 2/6
2 2/6+ 7 3/6= 9 5/6
2n-4=-12
Add 4 to both sides
2n=-8
Divide by 2 on both sides
n=-4
To do these types of questions do reverse PEMDAS. Do the opposite sign such as adding to undo subtraction.
The mean is the average. the median is the middle number. to find the mean, add all the numbers in the list and divide it by how many numbers there are. add 2+ 11 + 11 + 11 + 12 + 12 + 13 + 14 + 14 + 15 and divide them by 10. that’ll be your mean. to find the median, place them all in number order. the middle number is your answer
The opposite of -25
to find the opposite of a number, just switch the sign
example : opposite of 3 is -3
opposite of -5 is 5
so the opposite of -25 is 25 <==
