2 years ago

The total cost of a $112.75 meal with a 20% tip

Mathematics

1 answer:

VLD [36.1K]2 years ago

7 0

135.30 dollars is the total cost

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Find the inverse of the given function.

kodGreya [7K]

For this case we must find the inverse of the following function:

$f (x) = - \frac {1} {2} \sqrt {x + 3}$

We follow the steps below:

Replace f(x) with y:

$y = -\frac {1} {2} \sqrt {x + 3}$

We exchange the variables:

$x = - \frac {1} {2} \sqrt {y + 3}$

We solve for "y":

$- \frac {1} {2} \sqrt {y + 3} = x$

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$\sqrt {y + 3} = - 2x$

We raise both sides of the equation to the square to eliminate the radical:

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We change y by f ^ {- 1} (x):

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Answer: $f ^ {- 1} (x) = 4x ^ 2-3$

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Makovka662 [10]

I think the coordinates are 1, 10 but not positive because if you graph it you can see a kite in it so make the point close to 4,10

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3 years ago

Mr suresh had 7/9 kg of sugar. He used 1/3 of it. How much sugar did he use?

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1/3 * 7/9 kg = (1 * 7)/(3 * 9) kg = 7/27 kg

He used 7/27 kg of sugar.

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The total cost of a $112.75 meal with a 20% tip​

The total cost of a $112.75 meal with a 20% tip