Question

Need help ASAP, due today.

So I have to answer these questions but there are a LOT to answer. Please help me shave off time on this. Sorry if my handwriting is messy I wrote this fast. Thank you!

Answer 1

Q.17)

`(-(12)/(25))(15)/(32) = (-(3)/(5)) (3)/(8)=-(9)/(40)`

Q.18

`(-(3)/(5))(-(1)/(3))=((1)/(5))((1)/(1))=(1)/(5)`

Q.19

`(-(4)/(7))(-(1)/(20))=((1)/(7))((1)/(5))=(1)/(35)`

Q.20

`(3(1)/(3))((1)/(4))=((10)/(3))((1)/(4))=((5)/(3))((1)/(2))=(5)/(6))`

Q.21

`(4(1)/(4))(3(1)/(3))=((17)/(4))((10)/(3))=((17)/(2))((5)/(3))=(85)/(6)`

For the 17 times 5 part, a easy way to do it is to times 17 by 10, then divide by 2. (since 5 = 10 divided by 2)

So 17 x 10 = 170

170 / 2 = 85

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