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pogonyaev
3 years ago
11

Solve the following equation for x to find the total number of people who became members of a social networking site for a certa

in month:
x = 0.8x + 72

How many people became members of the site that month?

112
288
360
432
Mathematics
2 answers:
zavuch27 [327]3 years ago
5 0

Answer:

360 people

Step-by-step explanation:

     x = 0.8x + 72           Subtract 0.8x on both sides

0.2x = 72                  Divide 0.2 on both sides

      x = 360

enot [183]3 years ago
4 0

Answer:

The Answer is C. 360

360 People Became Members of that website that Month

Hope This Helps!

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The first two terms in an arithmetic progression are -2 and 5. The last term in the progression is the only number in the progre
Rudik [331]

Given:

The first two terms in an arithmetic progression are -2 and 5.

The last term in the progression is the only number in the progression that is greater than 200.

To find:

The sum of all the terms in the progression.

Solution:

We have,

First term : a=-2

Common difference : d = 5 - (-2)

                                      = 5 + 2

                                      = 7

nth term of an A.P. is

a_n=a+(n-1)d

where, a is first term and d is common difference.

a_n=-2+(n-1)(7)

According to the equation, a_n>200.

-2+(n-1)(7)>200

(n-1)(7)>200+2

(n-1)(7)>202

Divide both sides by 7.

(n-1)>28.857

Add 1 on both sides.

n>29.857

So, least possible integer value is 30. It means, A.P. has 30 term.

Sum of n terms of an A.P. is

S_n=\dfrac{n}{2}[2a+(n-1)d]

Substituting n=30, a=-2 and d=7, we get

S_{30}=\dfrac{30}{2}[2(-2)+(30-1)7]

S_{30}=15[-4+(29)7]

S_{30}=15[-4+203]

S_{30}=15(199)

S_{30}=2985

Therefore, the sum of all the terms in the progression is 2985.

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3 years ago
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Licemer1 [7]

Answer:

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Step-by-step explanation:

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3 years ago
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zheka24 [161]
<h3>Answer:  D. 5 blinks</h3>

=========================================================

Explanation:

First we'll need to find out how long it takes for the ball to go from the pitcher to the batter.

It needs to travel 60.5 feet and does so at a speed of 121 ft/sec

distance = speed*time

time = distance/speed

time = (60.5 ft)/(121 ft per sec)

time = 0.5 seconds

In half a second, the ball is from the pitcher to the batter.

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An eye blink is 0.1 second which means we can form this equation

0.1 second = 1 blink

We multiply both sides by 5 to get the "0.1 second" to turn into "0.5 seconds".

So,

0.1 second = 1 blink

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3 years ago
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25.2 / 7.8 = ~ 3.23 hope that helps

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3 years ago
At a carnival, single rides cost $2 each, and all day ride passes cost $15. The total revenue for the day was $2,960.
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Answer:

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Step-by-step explanation:

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