15 points 21. The sum of three numbers is 28. The second number is three times the first and the third is 7 less than the second. What are the numbers

First no=5,second no=15,third no=8

Step-by-step explanation:

First number =x

second number =3x

third number =3x-7

form equation and substitute

blue marble is 15 times out of 50 = 15/50 reduces to 3/10

landing on tails is 24 out of 50 = 24/50 reduces to 12/25

to find the probability of both multiply together:

3/10 x 12/25 = 3 x 12 / 10 x 25 = 36/250

if you multiplied the numerator and denominator by 10 you get 360/2500.

the answer is 360/2500

i can

step-by-step explanation: