How do you solve this equation with substitution, I was absent for school today and wasn’t able to learn the subject please help.

Roger and natalie travel in similar cars. roger's car drives the two miles to school in 7.5 minutes. natalie drives the same distance in the opposite direction but in only 6.5 minutes. what is true of their velocities?

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show