If y varies inversely as x and x is 6 when y is 13, what is x when y is 8? a.9.75 b.3.69 c.0.27 d.6.5

a.9.75

Step-by-step explanation:

When two quantities x and y are in inverse proportion, then we equation shows inverse variation is given by :-

Now, if y varies inversely as x and x is 6 when y is 13, then at y =8 , we have

Hence, if y varies inversely as x and x is 6 when y is 13, then when y is 8 , x=9.75.

answer:

c. the third graph

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.