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Answer:
The total cost of 1 belt and 1 tie is $13 and $39 respectively.
Step-by-step explanation:
Given that,
The cost of 4 belts and 5 ties is $247.
Each tie costs 3 times as much as a belt.
Let the cost of a belt is x and that of a tie is y.
ATQ,
4x + 5y = 247 ...(1)
y = 3x ....(2)
Put the value of y from equation (2) in equation (1)
4x + 5(3x) = 247
4x + 15x = 247
19x = 247
x = 13
Put the value in equation (2)
y = 3x
= 3(13)
= 39
So, the total cost of 1 belt and 1 tie is $13 and $39 respectively.
Hi there!

First replace m(x) by y.

To find the inverse function we must switch the places from the variables x and y.

Now we need to isolate the y again to find the formula of the inverse function. First add 5 to both sides.

Switch sides.

And finally divide both sides by 5.

And therefore we can conclude the following:

The answer is C.
~ Hope this helps you!
Answer:
45
Step-by-step explanation:
(replace m with 7 and replace n with 3)
6 x 7 = 42 then you add 3 = 45