how I stopped a alien invation using proportion

An alien landed in the middle of the city and he/she was going to contact the other aliens and destroy the Earth unless if somebody would answer 3 proportion questions and I just happened to be walking by so I will.

#17
Fresh pickerel is advertised in a local market.
2kg
Fresh pickerel
17.5o

a)How much will 6kg of pickerel cost?


6 kg of pickerel will cost $52.50.


b)Use a proportion to find the cost of 1600g of pickerel.

1g=o.oo1kg 1x1600=16oo/o.oo1x1600=1.6g


1600 g of pickerel will cost $14.58.

#18
At an amusement park, a new thrill ride was introduced. it costs $7.50 for 3 rides on the wild slider.

a) what is the wild sliders unite rate per ride?

the wild slider's unit rate per ride would be $2.50/ride.

b) at this rate how much will it cost for 18 rides on the wild slider? Determine the answer in two different ways.

My first way is

My second way is


#19

Determine the missing value in each equivalent fraction.

a) 3/4=18/44=9/12

b)48km/$16=144km/$48=192km/$64