4. If Mr. Key can walk 3 miles, at a constant rate, for 57 minutes, how long
will it take him to walk 5 miles at the same rate?
O
19 minues
O
95 minutes
O
34.2 minutes
0
7.125 minutes

What is the value of x when x + 7 = 21?

I'm confused on this could anyone me and show me what i need to do to solve it.

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.