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oksano4ka [1.4K]
2 years ago
9

Find the sum of the first 5,000 odd numbers

Mathematics
1 answer:
Nata [24]2 years ago
4 0

Step-by-step explanation:

this is an arithmetic sequence :

a1 = 1

an = an-1 + 2 = a1 + (n-1)×2

the sum of n terms of an arithmetic sequence is

S = n×(a1 + an)/2

n = 5000

an = a1 + 4999×2 = 9999

S = 5000×(1 + 9999)/2 = 5000×5000 = 25,000,000

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The graph of f(x) = -square root of x lies in quadrant _____.<br> I<br> II<br> III<br> IV
Julli [10]
I'm pretty sure, that the graph of f(x) = -square root of x lies in quadrant <span>IV</span>. I suggest you to search for special soft that will build you the graph by the formula you give.
5 0
4 years ago
Duo makes 65% of his dumplings with vegetarian fillings.
Ymorist [56]
13/25 because I got the answer right
5 0
3 years ago
An urn contains 2 red marbles and 3 blue marbles. 1. One person takes two marbles at random from the urn and does not replace th
Strike441 [17]
<h2>Answer with explanation:</h2>

Given : An urn contains 2 red marbles and 3 blue marbles.

Total marbles = 2+3=5

a) The general ways in which the person could get a red marble and a blue marble are :

1)  He draws red marble first and then second marble as blue.

2)  He draws blue marble first marble and then second marble as red.

b)  The number of ways to get one red and one blue marble is given by :-

^2C_1\times^3C_1=2\times3=6                          (i)

c) Number of ways to get 2 marbles from 5 is given by :-

^5C_2=\dfrac{5!}{2!(5-2)!}=\dfrac{5\times4\times3!}{3!\times2}=10     (ii)

Now, The probability the person gets a red and a blue marble will be :-

P(R\ \&B)=\dfrac{6}{10}=0.6       [Divide (i) by (ii)]

Hence, the  probability the person gets a red and a blue marble= 0.6

5 0
4 years ago
Find the surface area of the figure below. (attached image)
PIT_PIT [208]

Answer:

Surface area = 969mm squared

Step-by-step explanation

Front: 170mm

Back: 170mm

Right side: 170mm

Left side: 170 mm

Bottom: 289mm

Total: 969mm

Hope this helps!

4 0
3 years ago
Determine if the three given side<br> lengths form a right triangle.<br> 10 cm, 15 cm, 20 cm
antiseptic1488 [7]

Answer:

It doesn't form a right triangle

Step-by-step explanation:

According to the Pythagorean theorem, the area of the square whose side is the hypotenuse is equal to the sum of the areas of the squares on the other two sides.

a^2 + b^2 = c^2 by substituting the three values, 10, 15, and 20 you should get an equivalent value of the hypotenuse.

10^2 + 15^2 = 20^2

100 + 225 = 400

325 =/= 400

This is false.

Since this is not equivalent, it is NOT a right triangle.

Hope this helped :)

5 0
3 years ago
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