Answer:
Step-by-step explanation:
So we have the function:
To find the inverse function, switch x and f(x), change f(x) to f⁻¹(x), and solve for f⁻¹(x). Therefore:
Switch:
Add 1 to both sides:
Divide both sides by 6:
And that's our answer :)
a club decides to sell t-shirts for $15 as a fundraiser. It costs $20 plus $9 per t-shirt to make the t-shirts. write and solve
2 answers:
Given
a club decides to sell t-shirts for $15 as a fundraiser.
It costs $20 plus $9 per t-shirt to make the t-shirts
sell in order to profit at least $150
Find out the number tshirts the club needs sell in order to profit at least $150.
To proof
let the number of t-shirts sell by the club = x
t- shirt selling cost = $15
t-shirt making cost = $20 + $9 per t-shirt
= 20 + 9x
than the equation becomes
solving the above equation
we get
15x -9x ≥ 150 +20
6x ≥ 170
x ≥ 28.3 (approx )
In order to make a profit of atleast $150 club need to sell 28 t-shirts.
Hence proved
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