Lol I’m still having trouble with Solve the system of linear equations using substitution. Can someone tell me what i did wrong on this problem. X is one and I keep getting 0

It takes jonas 7 1/4 minutes to run the mile. it takes mario 8 5/12 to run the mile. how much faster is jonas than mario? 5/6 minute 1 1/3 minutes 1 1/6 minutes 1 1/2 minutesi will give points and brainlest

10% of 1,900,000. show me how you got the answer

Find the measure of anglec in the following triangle