If 2^x + 2^x + 2^x + 2^x = 2^k, then what is k in terms of x?

I need help with this concept!

Note that this equation can be re-written as:

4*2^x = 2^k

Or:

2^2 * 2^x = 2^k

Now recall that a^b * a^c = a^(b+c) - use this concept and you should be able to take it from here.

what is 7x-3y+6
-2+5y=-10
using elimination

what is 7x-3y+6
-2+5y=-10
using elimination

Delete.