Question

WILL MEDAL AND FAN Solve the word problem.

The formula d = rt gives the distance traveled in time t at rate r. A bicyclist rides for 1.5 hours and travels 25 miles.

What was her average speed?

A.
16.7 miles per hour

B.
23.5 miles per hour

C.
26.5 miles per hour

D.
37.5 miles per hour

Answer 1

Use the formula. Think. Plug them in.

Answer 2

SO 1.5 would be her time (t) and 25 miles would be her distance (d)

Answer 3

well im not sure what i got was 16.7 but im not sure if that is right

Answer 4

So basically I believe it is 20/1.5 which would equal 16.666666 etc. and that would round to 16.7.

Answer 5

wait can i use a calculater really quick

Answer 6

k

Answer 7

ok if i multiply i get 37.5

Answer 8

Im just making sure tho, adamaero, r is the average speed right. (haven't done this in a long time lol)

Answer 9

Wait why did you multiply.

Answer 10

In order to find the rate it would be 20 divided by 1.5

Answer 11

just cause i like to try everything to make sure i get it right

Answer 12

But the answer is 16.7 though. You were correct.

Answer 13

ok hope so

Answer 14

Its right. 100% positive

Answer 15

have time for one more?

Answer 16

yes

Answer 17

The formula P = ns gives the formula for the perimeter of a regular polygon with n sides and side length s.

What is the length of each side of a regular octagon with a perimeter of 54.4 cm? A regular octagon has 8 equal sides.

Answer 18

what i got was 3.2

Answer 19

so since the perimeter is 54.4, and there is 8 sides you would divide the perimeter by the number of sides.

Answer 20

6.8?

Answer 21

So if you use your handy dandy calculator, what would it equal?

Answer 22

correct.

Answer 23

But do you understand why it is like that.

Answer 24

so i did something wrong to get 3.2

Answer 25

yes. The total perimeter is 54.4. So if there are 8 sides, and the octagon is a regular shape, which means all sides are equal, there would be 8 equal parts of 54.4 in order for the shape to get the perimeter of 54.4

Answer 26

So you would divide 54.4 by 8 to get that. By that I mean the measure of one side.

Answer 27

god i hate math any other subject im fine but math makes want to kill someone XD

Answer 28

haha. we all have our moments. Night gotta go!

Answer 29

bye