Answer:
18
Step-by-step explanation:
12+24/4
12+6
18
jdndhdjd
Answer:
2
Step-by-step explanation:
it literally doubles in size
Answer:
-13
Step-by-step explanation:
Adding a negative means that you subtract the number as + (-) = -
This means that the equation is -4-9=-13.
ANSWER
My answer is in the photo above
S = a*((1 - r^(n+1))/(1-r))
S = 1*((1 - 2^(7+1))/(1-2))
S = 1*((1 - 2^8)/(1-2))
S = 1*((1 - 256)/(1-2))
S = 1*((-255)/(-1))
S = 255
So 1+2+4+8+...+128 = 255