Question 1
Write an expression that is equivalent to
6 (7x-x)

I'm not sure but... 36x ?

Step-by-step explanation:

42x-6x

36x

if you mean

then it's c. 8, -7/3

but if you mean

then it is

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.