Question

.please solve this in step by step explanation I will mark you as brainliest and follow you ​

Answer 1

this is your answer.....

Answer 2

11.  

cost of 1 fountain pen = 65 1/3

cost of 1 ball pen = 31 1/6

Therefore,

total cost of 3 fountain pens and 3 ball pens = 3*65 1/3+3*31 1/6

= 3(65 1/3+31 1/6) = 3(196/3+187/6) = 3*579/6 = 289 1/2

The property used is distributive property.

12.

i. True bcoz associativity not true for subtraction

ii. True bcoz associativity not true for division

iii. False. check it for urself