There are total of 63 bikes on a store. if the ratio of blue to red bikes is 4 to 5, how many of the bikes are blue

Ineed asap graph the system of equations 2x+y=5; 14+7y=35

Our goal is to collect email addresses from 60% of customers who purchase a product." so that means if i talk to 95 customers, i need to persuade to provide an email address?

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?