Question

please check

Answer 1

\(\color{#000000}{ \displaystyle a-(-b)=a+b }\)

Answer 2

So, for example if you had,
\(\color{#000000}{ \displaystyle 4-(-2)=4+2=6 }\)

(And not, \(\color{#000000}{ \displaystyle 4-(-2)=4-2=2}\). That would be FALSE!)

Answer 3

So, when you have \(\color{#000000}{ \displaystyle t(z)=7-z }\) and you want to find \(\color{#000000}{ \displaystyle z(-4) }\), you just
replace \(\color{#000000}{ \displaystyle z }\) with \(\color{#000000}{ \displaystyle -4 }\), and then apply the above rule \(\color{#000000}{ \displaystyle a-(-b)=a+b }\).

Answer 4

oooooohhhh okay i get it!!! its 11

Answer 5

Yes, very good!

Answer 6

thanks so much for helping me understand

Answer 7

yw