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3 years ago

norma practices violin for 50 minutes every day how many minutes does norma practices violin in 7 days

2 answers:

7 0

Well she practices 50 min every day and there is seven days. This is multiplication so 50 x 7 = 350, so she practices for 350 hours a week.

scoundrel [369]3 years ago

6 0

50 x 7 = 350 minutes

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Can someone help me on both of the questions?!

agasfer [191]

<span>(1) The correct answer is: Pressure = P = 70 N/m²

Explanation:
Pressure is force per unit area. Mathematically, we can write Pressure as follows:

</span> $P = \frac{F}{A}$ <span> --- (1)

Where P = Pressure = ?
F = Force = 140N
A = Area = 2.0m²

Plug in the values in (1):
P = 140/2.0
P = 70 N/m²

(2) The air particles in the inflated balloon are in chaotic motion. They are moving randomly and colliding with each other and with the inner wall of the balloon, exerting pressure on the wall of the balloon. Furthermore, they are far apart from each other, which is why when you squeeze the balloon, its shape changes accordingly as long as you are putting pressure on it while squeezing. </span>

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3 years ago

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Simplify this equation please.

Sauron [17]

$\dfrac{\csc^2\theta-3\csc\theta+2}{\csc^2\theta-1}$

Identity:

$\sin^2\theta+\cos^2\theta=1\implies1+\cot^2\theta=\csc^2\theta$

So we can rewrite the denominator to get

$\dfrac{\csc^2\theta-3\csc\theta+2}{\cot^2\theta}$

Multiply numerator and denominator by $\sin^2\theta$ . Several terms will cancel since $\sin\theta\csc\theta=1$ . Also, $\cot\theta=\dfrac{\cos\theta}{\sin\theta}$ . We get

$\dfrac{1-3\sin\theta+2\sin^2\theta}{\cos^2\theta}$

Factorize the numerator, and write $\cos$ in terms of $\sin$ in the denominator to factorize it further to get

$\dfrac{(1-\sin\theta)(1-2\sin\theta)}{\cos^2\theta}=\dfrac{(1-\sin\theta)(1-2\sin\theta)}{1-\sin^2\theta}=\dfrac{(1-\sin\theta)(1-2\sin\theta)}{(1-\sin\theta)(1+\sin\theta)}$

The $1-\sin\theta$ factors cancel, leaving you with

$\dfrac{1-2\sin\theta}{1+\sin\theta}$

which you could simplify a bit further by writing

$\dfrac{1+\sin\theta-3\sin\theta}{1+\sin\theta}=1-\dfrac{3\sin\theta}{1+\sin\theta}$

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4 years ago

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Olegator [25]

Answer: x=−0.208333

Step-by-step explanation:

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sweet [91]

Answer:

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In recent studies,each of the following variable pairs show a high correlation.which appear to share a cause-effect relationship

Len [333]

A and C are your answers

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3 years ago

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