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Alona [7]
3 years ago
7

The current in a simple electric circuit varies inversely as the resistance. If the current is 20amps when the resistance is 5 o

hms, find the current when the resistance is 8 ohms
Mathematics
1 answer:
IrinaVladis [17]3 years ago
3 0

Answer:

0.5amps

Step-by-step explanation:

I is inversely proportional to resistance

I = k/R

k = I/ R

k = 20/5

k = 4

This means that, I = 4/R

So, when R = 8ohms,

I = 4/8

 =0.5amps

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-25+t=-44 solve using addition principle. The solution is t=
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Explanation:

First, add by 25 both sides of an equation.

-25+t+25=-44+25

Then, simplify by equation and add/subtract by the numbers.

44-25=19

*The answer must be have a negative sign.

\boxed{t=-19}

Hope this helps!

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Have a great day!

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3 years ago
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0.3(3a-4)-0.05(8a)(-7a)
Anit [1.1K]

Answer:

2.8a²+0.9a - 1.2

Step-by-step explanation:

Given the expression 0.3(3a-4)-0.05(8a)(-7a)

Expand using the distributive law

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Rearrange

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Hence the required expression is 2.8a²+0.9a - 1.2

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