Jessie bought 3-t-shirt's for $6 each and 4 t-shirts for $5 each. which expression can you use to describe what jessie bought

Will give brainliest sum of arithmetic series (sigma notation) find the numerical answer to the summation given below. (image shown below)

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning