Mary, Rachel, and Tommy went out for lunch. Mary spend half of what Tommy spent. Rachel spend $12
less than what Tommy spent. Mary spent $8.50.
a) How much did Tommy spend? Explain how you got
your answer.

HELP
I got that they all spent 44.50 but I’m not sure...

Tommy spent $17

Step-by-step explanation:

Mary spent half of what tommy spent. 8.50 x 2= 17

therefore tommy spent $17

tommy spent $17

Step-by-step explanation:

8.50 X 2 is 17 and if Rachel spent $12 less than tommy did Rachel spent $5.

In total they spent $30.50

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.

i think is g(1)=-1.

hope that i can