Askateboarder traveled 3/5 of a mile in 1/20 of an hour. what was the skateboarder's speed in miles per hour

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?

Find the value of x in the diagram below. select the best answer from the choices provided

Find the percent error of the measurement 4 cm