I need to know what 9+10 is

Mathematics

2 answers:

koban [17]3 years ago

8 0

Answer:

9 + 10 is 19 because if you count like this

10,

11,

12,

13,

14,

15,

16,

17,

18,

19 you get 19 because there are 9 number in total making it 19

Dvinal [7]3 years ago

7 0

Answer:

There is a few ways to answer this:

The actual and simple way: 19

The way we use for fun, (meme way): 910

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For what side length(s) is the area of an equilateral triangle equal to 30 cm?? Only enter the number, in centimeters, rounded t

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Answer: The sides length are 8.32 cm

Step-by-step explanation:

An equilateral triangle has all his sides of the same lenght, so we assume that the triangle has an L lenght in his sides.

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To determine the height, we cut the triangle in half and take one side. By simetry, one side has a base of $\frac{L}{2}$ , a hypotenuse of L and a the unknown height.

Then we apply the Pythagoras theorem, this states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides, or, $hypotenuse = \sqrt{c^{2} + c^{2} }$ Where one c is $\frac{L}{2}$ and the other is the height.