<h3><u>Write 6^8 • 6^7 as a single power:</u></h3>
<em><u>Solution:</u></em>
Given that,
We have to write 6^8 • 6^7 as a single power
Given is:
<em><u>Use the following law of exponent</u></em>
When, the base is same, powers gets added
Therefore,
Thus the given is written as a single power
X = 4 , y = -1
Explanation:
solve by elimination ie eliminate x or y from the equations by performing operations on them.
first label the equations , to follow the process.
x - y = 5 ----------------(1)
x+ y = 3 ----------------(2)
If (1) and (2) are added then y will be eliminated.
(1) + (2) gives : 2x = 8 → x = 4
now substitute this value of x into either of the 2 equations and solve for y.
let x = 4 in (1) : 4 - y = 5 → -y = 1 → y = -1
check in (1) : 4-(-1) = 4+1 = 5
check in(2) : 4 - 1 = 3
