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3 years ago

Pls help With thissss

Mathematics

2 answers:

Grace [21]3 years ago

8 0

Answer:

Ion know lol

Step-by-step explanation:

Georgia [21]3 years ago

3 0

The answer is An estimate so it’s B

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50+51+52+...+101=... Can you help me? I do not understand

Dmitriy789 [7]

Suppose

$S=50+51+52+\cdots+100+101$

At the same time, we can write

$S^*=101+100+99+\cdots+51+50$

Note that $S=S^*$ (just reverse the sum). Let's pair the first terms of $S$ and $S^*$ , and the second, and the third, and so on:

$S+S^*=(50+101)+(51+100)+(52+99)+\cdots+(100+51)+(101+50)$

Now, each grouped term in the sum on the right side adds to 151. There are 52 grouped terms on that same side (because there are 50 numbers in the range of integers 51-100, plus 50 and 101), which menas

$S+S^*=52\cdot151$

But $S=S^*$ , as we pointed out, so

$2S=52\cdot151\implies S=\dfrac{52\cdot151}2=3926$

5 0

2 years ago

What is the difference in volume between a sphere with radius r and a sphere with radius 0.3r?

REY [17]

The volume of the sphere of radius r is:
V1 = (4/3) * (pi) * (r ^ 3)
Where,
r: sphere radius:
The volume of the sphere of radius 0.3r is:
V2 = (4/3) * (pi) * ((0.3r) ^ 3)
Rewriting:
V2 = (4/3) * (pi) * (0.027 (r) ^ 3)
V2 = 0.027 (4/3) * (pi) * (r ^ 3)
V2 = 0.027V1
The difference is:
V1-V2 = V1-0.027V1 = V1 (1-0.027)
V1-V2 = 0.973 * (4/3) * (pi) * (r ^ 3)
Answer:
the difference in volume between a sphere with radius and a sphere with radius 0.3r is:
V1-V2 = 0.973 * (4/3) * (pi) * (r ^ 3)

8 0

3 years ago

The sum of x and y is 7. The value of y is three more than the value of x. Write a system of equations to model this.

Ilia_Sergeevich [38]

Answer: x= 2 , y= 5 (5+2=7)

Step-by-step explanation:

I don't really know how to put it into an equation- but here's your values?? Sorry if this didn't help ):

6 0

3 years ago

IM GIVING 20 POINTS. Help me with this please. it would be very helpful.

Talja [164]

Solution:

hypotenuse=p

perpendicular=m

base=n

According to Pythagoras theorem,

h^2=p^2+b^2

So the right answer of your question is m^2+n^2=p^2

Right answer is of option A.

Hope it helps....

Good luck on your assignment

4 0

3 years ago

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The function shown models the horizontal and vertical distances, in feet, traveled by a person on a roller coaster. What horizon

Pani-rosa [81]

Answer:

20 and 25

Step-by-step explanation:

6 0

3 years ago

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