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3 years ago

Please help :) I will mark brainless

Mathematics

2 answers:

Mila [183]3 years ago

6 0

The answers A hope this helps

lbvjy [14]3 years ago

3 0

A
The dots above each number just show how many of said number r in the sequence (like the mode).

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Order the fractions from least to greatest. 1/6, 2/5, 3/5, 3/7. need help.

Snowcat [4.5K]

2/5, 3/7, 3/5 because 2/5 I imagine you already know so 3/7 is least because it has 7 and 7 is greater than 5 and remember that when you divide if the number you divide is greater than the answer is small idk if I explain myself

7 0

3 years ago

Mrs. Conley asks her class what kind of party they want to have to celebrate their excellent behavior. Out of all the students i

andriy [413]

Answer:

14 students are in the class

Step-by-step explanation:

3 0

3 years ago

Expand and simplify (<img src="https://tex.z-dn.net/?f=2x%5E%7B2%7D" id="TexFormula1" title="2x^{2}" alt="2x^{2}" align="absmidd

kupik [55]

Answer:

2x(5x + 14) + 15

Step-by-step explanation:

Given: (2 $x^{2}$ + 3)(4x + 5) - 8x( $x^{2}$ - 2)

(2 $x^{2}$ + 3)(4x + 5) - 8x( $x^{2}$ - 2) = 2 $x^{2}$ (4x + 5) + 3(4x + 5) - 8x( $x^{2}$ - 2)

= (8 $x^{3}$ + 10 $x^{2}$ + 12x + 15) - 8 $x^{3}$ + 16x

= 8 $x^{3}$ + 10 $x^{2}$ + 12x + 15 - 8 $x^{3}$ + 16x

collecting like terms to have,

8 $x^{3}$ - 8 $x^{3}$ + 10 $x^{2}$ + 12x + 16x + 15

10 $x^{2}$ + 28x + 15

Thus,

(2 $x^{2}$ + 3)(4x + 5) - 8x( $x^{2}$ - 2) = 10 $x^{2}$ + 28x + 15

= 2x(5x + 14) + 15

5 0

3 years ago

Dan is organizing a trip to the airport for a group of 75 people.

eduard

6 large taxis x 7 people per large taxi = 42 people. In total there are 75 people. 75-42=32 people left. If you want to divide these people over small taxis, you divide 32 by 4, 32/4=8, so you need 8 small taxis

6 0

3 years ago

The number of electrical outages in a city varies from day to day. Assume that the number of electrical outages ( x ) in the cit

forsale [732]

Answer:

Therefore, the mean and the standard deviation for the number of electrical outages (respectively) are 0.26 and 0.5765 respectively.

Step-by-step explanation:

Given the probability distribution table below:

$\left|\begin{array}{c|cccc}x&0&1&2&3\\P(x)&0.8&0.15&0.04&0.01\end{array}\right|$

(a)Mean

Expected Value, $\mu =\sum x_iP(x_i)$

=(0*0.8)+(1*0.15)+(2*0.04)+(3*0.01)

=0+0.15+0.08+0.03

Mean=0.26

(b)Standard Deviation

$(x-\mu)^2\\(0-0.26)^2=0.0676\\(1-0.26)^2=0.5476\\(2-0.26)^2=3.0276\\(3-0.26)^2=7.5076$

Standard Deviation $=\sqrt{\sum (x-\mu)^2P(x)}$

$=\sqrt{0.0676*0.8+0.5476*0.15+3.0276*0.04+7.5076*0.01}\\=\sqrt{0.3324}\\=0.5765$

Therefore, the mean and the standard deviation for the number of electrical outages (respectively) are 0.26 and 0.5765 respectively.

3 0

3 years ago