You ask your best friend to lend you ₹300, to buy your favourite toy. She says she can lend you the money only if you give her an extra ₹3, for every three months that pass before you return it.

your friend asks for RS 3 every three months, so in 9 months, you have to pay 9 RS extra so the amount you must play after 9 months is 309. the annual rate of interest will be basically the money you will have to give her after 12 month period which will be 12 rs. the annual rate of interest is 12pcpa

a

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.