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3 years ago

HELP I will give Brainliest If Correct!! (Please Explain)

Mathematics

2 answers:

Elan Coil [88]3 years ago

6 0

You need to write this is scientific form.

In this case it’s: 0.4 * 10^11

Natasha_Volkova [10]3 years ago

3 0

3.8 × 10^10 you have to round the number

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A student noticed that the average diameter of the glass beads used for the mass measurements was significantly smaller than tho

Levart [38]

Answer:

The error mentioned is a systematic error.

Step-by-step explanation:

The glass beads used for mass measurements was noticed to be significantly smaller than those used for volume measurements.

The formula for density is = $\frac{mass}{volume}$ .

So if we try to experimentally determine the value of density of glass then the beads for measuring the mass are much smaller than the beads for measuring volume.Thus in this case we can see that the density measured will actually be less than the actual density of glass.

However since this error can be seen and quantified and corrected it is not a random error, but it is a systematic error.

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3 years ago

X+y=2 x-y=4 solve using elimination

Goshia [24]

(3, -1) Looking at the two equations I see that you have a+ y in equation one and − y in equation two. By adding the two equations together I will eliminate the y variable and then you can solve for x.

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2 years ago

Of the students attending a school party, 60% of the students are girls, and 40% of the students like to dance. After these stud

elena-s [515]

Answer:

252 students at the party like to dance

Step-by-step explanation:

Given:

60% of the students are girls

40% of the students like to dance

20 more boy students

Percentage of the girls in the party = 58%

To Find:

How many students now at the party like to dance=?

Solution:

Let the number of girls be g.

Let the number of total people originally be t.

We know that

$\frac{g}{t}=\frac{60}{100}$

$\frac{g}{t}=\frac{3}{5}$ ----------------------------------(1)

We also know that

$\frac{g}{t+20}=\frac{58}{100}$

$\frac{g}{t+20}=\frac{29}{50}$ -----------------------------(2)

We now have a system of equation from (1) and (2)

3t=5g

$g = \frac{3t}{5}$ ------------------------(3)

50g=29t+580------------------------(4)

Substituting 3 in 4, we get

$50(\frac{3t}{5})=29t+580$

$(\frac{150t}{5})=29t+580$

$30t =29t+580$

$30t -29t = 580$

t =589

So originally there was 580 students

In this 580 students 40% liked to dance

Then the number of students liked to dance =

=> $40\% \text{of} 580$

=> $\frac{40}{100} \times 580$

=> $0.4 \times 580$

=> 232

We also know that with these people, 20 boys joined, all of whom like to dance.

Now the number of students like to dance = 232+20 = 252 students

7 0

3 years ago

The diagram shows a right-angled triangle.

musickatia [10]

I need to see the diagram please

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3 years ago

#middleschoolstruggles Please help me with the page. Could u please include an answer and how u got it. Thanks

german

The pattern they're looking for in the uppermost question is 0,2,6,14,30,62.

The second problem shows the Fibonacci sequence. Each number is the sum of the two numbers before it. So:

2,3,5,8,13,21,34

34 are the number of miles she'll run on Week 8.

The equation on the bottom right is M = 5p. The first two numbers in the function table are 25 and 50.

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3 years ago