Francesca wants to start exercising to burn at least 1500 extra calories per? week, but she does not have much spare time for exercise. according to a? website, she can burn an average of 3.5 calories per minute? walking, 4 calories per minute? cycling, and 8 calories per minute swimming. she would like her total time walking and cycling to be at least 3 times as long as she spends swimming. she would also like to walk at least 20 minutes per week. how much time should she spend on each activity not only to meet her goals but also to minimize her total exercise time per? week? what is her minimum exercise time per? week?

the answer is 150.6

step-by-step explanation:

you multiply .02 by 30 and get .6.

and then you multiply 5.00 by 30 and get 150.

hope this !

might be the correct answer will be question number 2

look at the picture.

1.

ef : ab = 2 : 3

gf : cb = 2 : 3

gh : cd = 2 : 3

he : da = 2 : 3

2.

∠a ≅ ∠e

∠b ≅ ∠f

∠c ≅ ∠g

∠d ≅ ∠h

3.

use pythagorean theorem:

the length of the abcd trapezoid sides:

|ab| = 3 cm

|bc| = 10 cm

|cd| = 3(3) cm = 9 cm

|da| = 8 cm

the perimeter of abcd = 3 + 10 + 9 + 8 = 30 cm

the ratio of perimeters of the tarapezoids is equal 2 : 3.

substitute:

      cross multiply

      divide both sides by 3

the easiest way to do these would be to solve the equations. if you can solve the equation than you can solve these problems.