Bryanna performed an experiment in which she flipped a coin and recorded the results. She got heads up 23 times and tails up 27 times.

if you are asking the probability of heads vs tails, then its a 50/50 most of the time, just in this situation, there was 1% more chance to get tails.

Step-by-step explanation:

still 50/50, because .01 is a very small number.

32/80  

91/140

the last one 54 doesn't go into 45. 54/100 ?

step-by-step explanation:

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9