Answer:
he needs 4,000 fake dollars
Step-by-step explanation:
right now he has enough to buy something for $60 so he needs another 220 fake dollars to have enough for a $68 item
substitution and elimination means that you need to use one equation and substitute it in place of some variable in the other equation.
Consider the above two equations.
Take equation 1, which is 4x-2y=22 => x=(22+2y)/4
substitute the x value gained above in equation 2.
so, 2((22+2y)/4)+4y=6
22+2y+8y=12 => 10y = -10 => y= -1.
Substitute y= -1 in x value obtained in the beginning.
So, x= (22 - 2)/4 => 5.
There fore, x= 5 and y= -1
Hope it helps.
25% of 8 is 2, 8-2=6
2 are red, 6 are blue
Given:
The expression is:
To find:
The exponential notation for the given expression.
Solution:
We know that
...(i)
We have,
Using (i), the given expression can be written as:
Therefore, the exponential notation of the given expression is 
.
