Does anybody know how to do this I really need help I mark your answer as brainliest answer

the fist one is not equalvalent but i think th second one isand the third isnt definetly or the last one is i think. hope this !

step-by-step explanation:

answer;

the correct answer

just use google you beautiful person.

have a nice day < 3

so, converting firstly the mixed fractions to improper fractions and then "adding".

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.