Monica thinks of a number. When she takes away seven of 5/6 of a number she gets 28. find the original number she thought of​

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

47 - 90 = 43

43 - 180 = x

x = 137

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,