Kathy is twice as old as mary. kathy is 2 yrs younger than jon. the sum of all three ages is 77. how old is kathy?

I think Kathy is 75 years old

Step-by-step explanation:

If kathy is twice as old as Mary, that makes Mary 37 and a half, as that times 2 is 75, and that's two years younger than Jon

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

i believe it is 0.1m because the measurement of 30.4m limits how precise you can be

you can only be as precise as the least precise measurement