Answer:
4.2 x 10^6 − 1.2 x 10^5 − 2.5 x 10^5
All exponent have to have the same number
42 x 10^5 − 1.2 x 10^5 − 2.5 x 10^5
Subtract the number
42 - 1.2 - 2.5 = 38.3
Add back the exponent
38.3 * 10 ^5
This is not in scientific notation
Move the decimal one place to the left and add one to the exponent
3.83 * 10^6
3.3 x 10^9 + 2.6 x 10^9 + 7.7 x 10^8
All exponent have to have the same number
3.3 x 10^9 + 2.6 x 10^9 + .77 x 10^9
Add the numbers
3.3+2.6+.77 =6.67
Add back the exponent
6.67*10^9
This is in scientific notation
8.0 x 10^4 − 3.4 x 10^4 − 1.2 x 10^3
All exponent have to have the same number
8.0 x 10^4 − 3.4 x 10^4 − .12 x 10^4
Subtract
8.0 - 3.4 - .12 = 4.48
Add back the exponent
4.48* 10^4
This is in scientific notation
Looks like a whole lot of fun you got there... Okay.. so first you'd have to add up the two values on the left side by multiplying the top and bottom of the first by the denominator of the second and by multiplying the top and bottom of the second by the denominator of the first, like this (sorry for all the parentheses) :
[x(x-4)]/[(x+4)(x-4)] + [4(x+4)]/[(x+4)(x-4)]. now you can add them together:
[x(x-4)+4(x+4)]/[(x+4)(x-4)] then i'd try to combine the top:
x^2-4x+4x+16 or x^2+16, then i'd combine the bottom (since i just noticed something awesome here):
x^2-4x+4x-16 or x^2-16. This makes the left side look exactly like the right ( isn't that awesome!) This means x = 1!
Answer:
2,125,760
Step-by-step explanation:
The first term (a) is 8
The fourth term is 216
Hence the sum of the first 12 term can be calculated as follows
= 8-8(3)^12/1-3
= 8-24^12/-2
= 2,125,760
The sum of first 12 terms is 2,125,760
Amount remaining would be: 1-(3/8+1/5) = 1-23/40 = 17/40
So, 17/40 is your answer.......