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AlexFokin [52]
4 years ago
10

Plz solve it#myfirstquestion​

Mathematics
1 answer:
Umnica [9.8K]4 years ago
6 0

Answer:

Answer is x = 45+5√241/2

(or) x = 45-5√241/2

Step-by-step explanation:

Answer is solved by completing square method.

If you have any doubts see the image or comment in my page.

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Dan and David are marking exam papers. Each set takes Dan 35 minutes and David 1 hour. Express the times Dan and David take as a
blagie [28]

Answer:

Step-by-step explanation:

1 hour =60 minutes

Ratio =35

60

= 7

12

Answer=7

12

8 0
3 years ago
the graph shows the time and distance that a horse ran around a track if the horse runs at that same speed, how long will it tak
SVETLANKA909090 [29]

Using the values given at the red dot, the horse ran 0.2 miles in 20 seconds.

Divide 1.5 miles by 0.2:

1.5 / 0.2 = 7.5

Multiply that number by 20 seconds:

7.5 x 20 = 150 seconds

1 minute = 60 seconds

150 / 60  = 2.5

It will take 2.5 minutes to run 1.5 miles

7 0
3 years ago
The ratio of hydrogen to oxygen atoms in water molecules is 2 to 1. If the beaker of water contained 4.1 moles of oxygen atoms,
Ad libitum [116K]

Answer:

8.2

Step-by-step explanation:    

We have been given that the ratio of hydrogen to oxygen atoms in water molecules is 2 to 1.      

We can represent this information as: \frac{\text{Hydrogen}}{\text{Oxygen}} =\frac{2}{1}

Let x be amount of moles of hydrogen atoms in water beaker. The proportion of hydrogen and oxygen moles will be same in water beaker.

Upon substituting our values in above proportion we will get,

\frac{2}{1} =\frac{x}{4.1}            

x=2\times 4.1              

x=8.2    

Therefore, the moles of hydrogen atoms in water beaker will be 8.2.

5 0
3 years ago
Emilio used addition of two rational numbers to solve a problem. Jim use subtraction to solve the problem. Is it possible that t
densk [106]

Answer:

69

Step-by-step explanation:

cause it is

5 0
4 years ago
Write your question here (Keep it simple and clear to get the best answer)4x³-5x is it odd or even function
Dvinal [7]

Answer:

odd

Step-by-step explanation:

To determine if odd/ even

• If f(x) = f(- x) then it is even

• If f(- x) = - f(x) then it is odd

Given

f(x) = 4x³ - 5x , then

f(- x) = 4(- x)³ - 5(- x) = - 4x³ + 5x

Since f(x) ≠ f(- x) then it is not even

- f(x) = - (4x³ - 5x) = - 4x³ + 5x

Since f(- x) = - f(x) , then 4x³ - 5x is odd

5 0
3 years ago
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