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Nezavi [6.7K]
3 years ago
8

What is the answer to this question

Mathematics
1 answer:
solmaris [256]3 years ago
5 0

Answer:

Number of protons

Step-by-step explanation:

The atomic number represents the number of protons that are in the nucleus. This says what chemical properties something has and where it is located on the periodic table.

Best of Luck!

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Adiciona el término que hace falta para que sea un trinomio cuadrado perfecto x^2+3x+1​
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COSAS

Step-by-step explanation:

en realidad hablo inglés XD

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If anybody could help me please :,) will give brainliest + 100 points
Alinara [238K]

Answer:

P(B and D) = 0.35

Step-by-step explanation:

It is a probability tree diagram. Here to find P(B and D):

apply method:

P(A and B) = P(A) × P(B)

Here given:

  • P(B) = .5
  • P(D) = .7

So, P(B and D):

  • P(B) × P(D)
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W/5+20=22. How do I do this
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Last year at Tamara made 42,789. How much did she make each month (12 months)?
zavuch27 [327]

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3 years ago
There are five families that each have one child. Each of them hires Riley as a babysitter. Because the children she babysits ar
GREYUIT [131]

Answer:

Average Rate of Pay = $ 5.23 /hr

Step-by-step explanation:

We have a data in form of Hours of Baby Sitting and Amount of Pay. Since the Amount of pay depends upon the Hours of Baby Sitting. Thus, we take y = Amount of Pay, while x = Hours of Baby Sitting. So, the data becomes:

x (Hours) =   12      13      16      17       20

y ($)         =  54     56     65     64     100  

The statistical data calculated is:

∑x = 78,   ∑x² = 1258,   ∑y = 339,  ∑xy = 5504,   n = no. of data points = 5

Now, we use linear regression model to fit a straight line to this data.

y = a + bx   --------- eqn (1)

where,

b = [ n∑xy - ∑x.∑y]/[n∑x² -(∑x)²]

b = [ (5)(5504) - (78)(339)]/[(5)(1258) - (78)²]

b = 5.23

and,

a = (∑xy - b∑x²)/∑x

a = [5504 - (5.23)(1258)]/78

a = -13.83

Therefore, eqn (1) becomes:

<u>y = -13.83 + 5.23x</u>

The graph plot of this straight line fit is provided in the attachments.

Now, we derivate the equation with respect to x, to get the average rate of pay:

Average Rate of Pay = dy/dx = d/dx(-13.83 + 5.23x)

<u>Average Rate of Pay = $ 5.23 /hr</u>

8 0
3 years ago
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