Kelvin plans to buy potato chips and coke with $50. if he buys 3 packs of potato chips and 2 cans of coke, $9 will be left. if he buys 4 packs of potato chips and 5 cans of coke, he will need $21 more. find the prices of a pack of potato chips and a can of coke respectively.

the square root of what number? if you add that, then someone will probably answer the question.

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.