82 + 79 + 72 + 72 + 81 + 77 + 69= 532
532/7 = 76
The mean is 76
The answer to this is -7 + 2x
You first do distributive property which would be (2 * x) = 2x and (2 * -5) = -10
After you do this you would do 3 + (-10) which gives you -7, because its adding opposites so you subtract
After this you have -7 +2x
Yes, all of them are correct the answer is 3.25
I use a website called papa math the chocolate chip cookies are $2.50 while the cupcakes are $3.00 what i did was this 81=18c+12r; 77=2c+24r hope it will help you the long way when you use the papa math calculator