Cc algebra 2 problem 1-26 section 1.1.3 i need help with all of them please and thank you and if you can explain itd be great

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

At the electronics store you have a coupon for 20% off up to 2 cds you buy for cds with the original cost of $10.99 each the sales tax is 5% what is the total cost of your purchase