there are 63 couples lined up for an egg tossing contest.Each couple will get one egg.There are 12 eggs in a dozen,and eggs come in one dozen cartons.How many cartons of eggs are needed for the contest?

When looking for an estimate, you have to round your numbers 21 rounded would become 20 and 357.9 would become 360. So next you would divide the numbers.

360 ÷ 20 =  18

So, Ellen would have used approximately 18 gallons of gas.

Hope this helps you. :-) 

Final answer:

Reflections in geometry involve flipping a shape over a line. This concept is seen in the real world during instances like mirror images, light reflected off smooth surfaces, and reflections on water bodies.

Explanation:

In the field of geometry, a reflection is the flipping of a shape over a line, often referred to as the mirror line. Reflections are a common occurrence in our everyday real world.

• One of the most common instances of reflection in the real world is a mirror image. When you look at yourself in a mirror, the image you see is a mirrored or reflected image of yourself.
• Similarly, the reflection of light off a smooth surface, like a glass window or shiny car, is another common real-world reflection we see daily.
• Additionally, the reflections seen on bodies of water, such as lakes or even dewdrops on a blade of grass, are examples of reflection in nature.

Learn more about Reflections in Real World here:

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Answer:

m<2 = 50°

Step-by-step explanation:

Right triangle

m<3 = 40

so m<2 = 90 - m<3

m<2 = 90 - 40

m<2 = 50