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3 years ago

10

There is 1/4 chance of picking a green marble from a bag. IF there are 20 total marbles in the bag, how many marbles must be gre

en?

1 answer:

matrenka [14]3 years ago

8 0

Answer:

5 green marbles.

Step-by-step explanation:

20* 1/4 = 5

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Help answering this simple Series Question? I don't know what I did wrong!

Tatiana [17]

Looks like you just evaluated the summand for the given value of $n$ , whereas the question is asking you to find the value of the sum for the first $n$ terms.

Let $S_k=\displaystyle\sum_{n=1}^k\frac3{(-2)^n}$ . Then $S_k$ is the $k$ th partial sum.

$S_1$ happens to be the first term in the series, which is why that box is marked correct:

$S_1=\displaystyle\sum_{n=1}^1\frac3{(-2)^n}=\frac3{(-2)^1}=-1.5$

But the next partial sum is not correct:

$S_2=\displaystyle\sum_{n=1}^2\frac3{(-2)^n}=\frac3{(-2)^1}+\frac3{(-2)^2}=-0.75$

and this is not the same notion as the second term (which indeed is 0.75) in the series.

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3 years ago

A theater group made appearances in two cities. The hotel charge before tax in the second city was $1000 lower than in the first

Artyom0805 [142]

Answer:

Let x = the charge in 1st city before taxes

Let y = the charge in 2nd city before taxes

Set up equation before taxes.

y = x - 1500 eq1

Set up equation for total tax paid.

0.065x + 0.06y = 378.75 eq2

Substitute eq1 into eq2.

0.065x + 0.06(x - 1500) = 378.75

0.065x + 0.06x - 90 = 378.75

0.125x - 90 = 378.75

0.125x = 468.75

x = 3750

Substitute this value of x into eq1.

y = 3750 - 1500

y = 2250

The hotel charge in city one is $3750 and the hotel charge in city two is $2250

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3 years ago

Here a brainliest if you get it right

oksian1 [2.3K]

Answer:

D.(2, 2)

Step-by-step explanation:

Staring point = (2, -4)
Since he moved 6 units up, so, there will be change in only y-coordinate of the starting point and x-coordinate will remain unchanged.
End point of the segment = (2, - 4 + 6) = (2, 2)

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2 years ago

Please help me with this question from my homework: (Answers in English please :) In the figure, m<1=7x+8, m<2=4x+11, and

BigorU [14]

Answer:

54.896

Step-by-step explanation:

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3 years ago

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Answer:

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