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3 years ago

20% tip on a 10.50 lunch

Mathematics

2 answers:

Oduvanchick [21]3 years ago

8 0

To find what the tip is, just multiply 0.20 (20% in decimal form) and 10.50, which will be $2.10.

If you want to know the total cost is including tip, just add 10.50 and 2.10 together, which will be $12.60

PtichkaEL [24]3 years ago

5 0

The answer is $12.60

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3 years ago

If 5 cans of baked beans cost $2.85, how<br> many cans of baked beans can be bought<br> for $19.38?

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3 years ago

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Maru [420]

Evaluate the function at 2. That is f(2).
Evaluate the function at 0. That is f(0).

the average rate of change from 0 to 2 is (f(2) - f(0))/(2 - 0)

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f(2) = 120(0.1)^2 = 120 * 0.01 = 1.2

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4 years ago

If a girl in a bikini has walked 4 KM in 10 minutes, How many kilometers does she walk in 3 years?

Mashutka [201]

Answer:

631139.04 kilometers in 3 years

Step-by-step explanation:

Let x = how many kilometers she walk

y = time (minutes)

Since she walks 4km in 10 minutes.

x = 4, y = 10

(4,10)

But how many minutes if she walk only a kilometer? Divide x and y by 4.

(1,2.5)

She walks a kilometer under 2.5 minutes.

Now finding rate of changes.

$\displaystyle \large{m = \frac{10 - 2.5}{4 - 1} } \\ \displaystyle \large{m = \frac{7.5}{3} } \\ \displaystyle \large{m = 2.5}$

Since m = 2.5

and of course, the function should be proportional so the equation should be y = mx.

$\displaystyle \large{y = 2.5x }$

Since time should be minutes instead of years.

Since 3 years = 1577847.6 minutes

$\displaystyle \large{1577847.6 = 2.5x}$

Divide both sides by 2.5

$\displaystyle \large{ \frac{1577847.6}{2.5} = x} \\ \displaystyle \large{631139.04 = x }$

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3 years ago