To find the inverse of this function, we need to perform some steps.
f(x) = 2x + 9
Replace f(x) with y.
y = 2x + 9
Swap x and y.
x = 2y + 9
Solve for y.
Subtract both sides by 9.
x - 9 = 2y
Divide both sides by 2.
(x - 9)/2 = y
Replace y with f^-1(x)
<h3><u>f^-1(x) = (x - 9)/2</u></h3>
Answer:
the pencils cost $0.07 each and the erasers cost $0.03 each
Step-by-step explanation:
okay so this is kind of a guess
julio bought 4 pencils and 3 erasers for a total of $0.37
and if <u>the pencils cost $0.07 and the erasers cost $0.03</u>
then 4 pencils would equal $0.28 and 3 erasers would equal $0.09, the total would be $0.37
idk how much money david spent but i can assume that he spent a total of $0.33 because 3 pencils would cost $0.21 and 4 erasers would cost $0.12
Answer:
PS = 10
Step-by-step explanation:
Well this one is very simple. It seems to give 1 lb per 4 dollars spent. So, the best way to state this mathematically is x=4y or x=4×y.
Multiply the variable k times 4 would give you 4k.
Then cross multiply 14x8 = 112
Therefore, you would have 4k = 112.
Divide 112 by 4 to get your answer!