Question

If pentagon OPQRS is dilated by a scale factor of 7/4 from the origin, to create O’P’Q’R’S’, what is the ordered pair of point P’?

(-8.75, 5.25)

(-1.25, 0.75)

(-3.5, 8.75)

(-1.75, 3.5)

Answer 1

All you need to do here is multiply each coordinate of P by 7/4 to find the corresponding coordinates of P'

Answer 2

err ok...

Answer 3

does that make sense?

Answer 4

not really :/

Answer 5

What's the x coordinate of P?

Answer 6

-5

Answer 7

So multiply that by 7/4 to get ???

Answer 8

ohhhh okay.

Answer 9

and you do the same for the y coordinate as well

Answer 10

ok so (-8.75, 5.25)

Answer 11

you got it

Answer 12

would i do the same for this? If hexagon IJKLMN is dilated by a scale factor of from the origin to create hexagon I’J’K’L’M’N’, what is the ordered pair of point L’?

Answer 13

sooo the answer would be (-0.4, 0.8) ?

Answer 14

scale factor of what?

Answer 15

ahh I'm sorry, 2/5

Answer 16

you got it again, nice job

Answer 17

last question, I swear ;) If the perimeter of the adult pinball machine is 177 inches, what is the length, in inches of GA ?

Answer 18

Any ideas on how to do this?

Answer 19

hmm, I'm sure there is a formula..errr would it be 9. wild guess

Answer 20

The perimeter of the adult pinball machine is 177 inches, so the sides of that pinball machine must add to 177 right?

Answer 21

yeah..

Answer 22

so we have 4 sides, 3 of which are known

Answer 23

let's make GA x units long, so this means that


35+56+56+x = 177

Answer 24

omg I knew that. I meant, (sorry, my mistake), G'A'

Answer 25

no worries

Answer 26

Notice how the ratio of EM to E'M' is 35/14, do you see this?

Answer 27

yes

Answer 28

So if G'A' is y units long, then


EM/E'M' = GA/G'A'

35/14 = x/y


So you first solve for x (using the equation in a few posts above). Then you use this equation to find y

Answer 29

So, 12?

Answer 30

@jim_thompson5910

Answer 31

you got it, you're on a roll :)