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2 years ago

Please answer i need help

Mathematics

1 answer:

musickatia [10]2 years ago

8 0

Answer:

use propotional theorem

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4. The probability of it raining tomorrow is 0.34. What is the probability it doesn't rain?

ELEN [110]

Answer:

99.66%

Step-by-step explanation:

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2 years ago

Someone do this thanks

Arturiano [62]

Answer:

Step-by-step explanation:

12-2= m(2+3)

m= 10/5=2

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2 years ago

If (x, 3.4) is a solution to the equation 3x – 5y = 55, what is the approximate value of x?

Whitepunk [10]

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3 years ago

Read 2 more answers

The point (12, 5) is on the terminal side of angle θ. cos θ = cot θ =

natita [175]

Step-by-step explanation:

The point (12, 5)

x = 12, y = 5

=> r =√12²+5² =√144+25= √169=13

so, cos θ = x/r = 12/13 and

cot θ = x/y = 12/5

3 0

2 years ago

An alternating current E(t)=120sin(12t) has been running through a simple circuit for a long time. The circuit has an inductance

Dvinal [7]

Answer:

14.488 amperes

Step-by-step explanation:

The amplitude I of the current is given by

$\large I=\displaystyle\frac{E_m}{Z}$

where

$\large E_m$ = amplitude of the energy source E(t).

Z = Total impedance.

The amplitude of the energy source is 120, the maximum value of E(t)

The total impedance is given by

$\large Z=\sqrt{R^2+(X_L-X_C)^2}$

where

R= Resistance

L = Inductance

C = Capacitance

w = Angular frequency

$\large X_L=wL$ = inductive reactance

$\large X_C=\displaystyle\frac{1}{wC}$ = capacitive reactance

As E(t) = 120sin(12t), the angular frequency w=12

$\large X_L=12*0.37=4.44\\\\X_C=1/(12*7)=0.012$

and

$\large Z=\sqrt{7^2+(4.44-0.012)^2}=8.283$

Finally

$\large I=\displaystyle\frac{E_m}{Z}=\frac{120}{8.283}=14.488\;amperes$

7 0

3 years ago