Answer:
6554
Step-by-step explanation:
The sequence 2, -8, 32, -128 has a first term (a1) of 2 and a common ratio (r) of -8/2 = -4. The sum of n terms is given by ...
Sn = a1·(r^n -1)/(r -1)
For your sequence, the sum of 7 terms is ...
S7 = 2·((-4)^7 -1)/(-4-1) = 2(-16384/-5) = 6554
The sum of changes after the 7th day is 6554.
Answer:
8x+3y
Step-by-step explanation:
1. Find like terms: 5x and 3x share the same constant "x" so you can combine them. There is nothing to combine with the 3y since there is no other term with the constant "y".
2. Rearrange to make it easier to see: 5x+3x+3y
3. Add the 5x and 3x: 8x+3y
She made 15 cookies
<em><u>Solution:</u></em>
Let "x" be the number of cookies she made
She gave 1/3 of cookies for her husband
Therefore,

Find the remaining

1/4 of the cookies to her son
Therefore,

Now again find the remaining

1/6 of a cookies to her neighbor

Now again find the remaining

She ate the remaining six cookies
Therefore,

Thus she made approximately 15 cookies
Answer:
20/10 is 2
Step-by-step explanation: