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Art [367]
2 years ago
10

Luna's bill for lunch at a restaurant was $11. She left a 20% tip. What was the amount of the tip?

Mathematics
1 answer:
Deffense [45]2 years ago
7 0

Answer:

$2.20

Step-by-step explanation:

If you want to leave a 20% tip, multiply the cost by 0.20 to get the tip amount or multiply the cost by 1.20 to get the total including tip.

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the half-life of isotope X is 2.0 years. How many years would it take for a 4.0mg sample of X to decay and have only 0.50 mg of
shepuryov [24]

After 2.0 years, the 4.0 mg sample decays to 2.0 mg.

After another 2.0 years (total 4.0 years), the 2.0 mg sample decays to 1.0 mg.

And after another 2.0 years (total 6.0 years), the 1.0 mg sample decays to 0.50 mg.

So it takes 6.0 years for 4.0 mg to decay to 0.50 mg.

4 0
2 years ago
I need help please....
Semmy [17]

Answer:x=-7

Step-by-step explanation:

5 0
2 years ago
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drek231 [11]
The original side length was 12m therefore the perimeter was 36m. 12/4 is 3 so the perimeter is now 9, and the difference between them is 27.
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2 years ago
50 POINTS!
ehidna [41]

Answer:

  • A. the distance between points W and X

Step-by-step explanation:

<u><em>Looking for the distance of 5 units</em></u>

A. the distance between points W and X

  • -3 - (-8) = -3 + 8 = 5
  • Correct

B. the distance between points X and Y

  • 1 - (-3) = 1 + 3 = 4 < 5
  • Incorrect

C. the distance between points X and Z

  • 5 - (-3) = 5 + 3 = 8 > 5
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D. the distance between points Y and Z

  • 5 - 1 = 4 < 5
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7 0
2 years ago
How do you find the minimum value of a quadratic function?
aniked [119]

The minimum value of a function is the place where the graph has a vertex at its lowest point.

There are two methods for determining the minimum value of a quadratic equation. Each of them can be useful in determining the minimum.

(1) By plotting graph

We can find the minimum value visually by graphing the equation and finding the minimum point on the graph. The y-value of the vertex of the graph will be the minimum.

(2) By solving equation

The second way to find the minimum value comes when we have the equation y = ax² + bx + c.

If our equation is in the form y = ax^2 + bx + c, you can find the minimum by using the equation min = c - b²/4a.

The first step is to determine whether your equation gives a maximum or minimum. This can be done by looking at the x² term.

If this term is positive, the vertex point will be a minimum; if it is negative, the vertex will be a maximum.

After determining that we actually will have a minimum point, use the equation to find it.

6 0
3 years ago
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