You burn 20 calories per minute biking for x minutes and 10 calories per minute walking for y minutes. You can spend a total of 90 minutes biking and walking and burn 1300 calories. A.)write a system of equations to determine how much time you spend on each exercise.

B.) how many minutes did you spend biking?

x divided by 8=y

step-by-step explanation:

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.