Nikki is thinking of three numbers. The three numbers add up to 60. The middle number is twice as large as the smallest number. If you add up the two largest numbers and subtract the smallest number from the sum you get 40. Write a system of equations from the given information.

the answer to your question a or b but i am pretty sure it is b. i hope this : )

step-by-step explanation:

the answer would be 1 1/72

step-by-step explanation:

you can rewrite the equation by separating the parts and then solving individually:

10-9=1

1/8 - 1/9=

find l c d and then combine:

1 1/72

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.