8) if the resistance in an electrical circuit is held constant, the amount of current flowing through the 8) circuit is directly proportional to the amount of voltage applied to the circuit. when 2 volts are
applied to a circuit, 40 milliamperes of current flow through the circuit. find the new current if the voltage is increased to 4 volts.
a) 100 milliamperes b) 76 milliamperes c) 80 m

C) 80 milliamperes

Step-by-step explanation:

The amount of current flowing through a circuit is directly proportional to the amount of voltage applied across the circuit. The relation between current(I) and voltage(V) can be expressed as:

Here, is the proportionality constant. It is given that, when voltage is 2 volts, 40 milliamperes( amperes) current flow through the circuit. Using these  values we can find the value of proportionality constant. i.e.

Using this value, we can establish the relation between I and V as:

Now, we need to calculate value current (I) if voltage is equal to 4 volts. Substituting V = 4 in above equation, we get:

Thus, the value of current will be 80 milliamperes

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions

pi or 3.14159265359 is an irratinal decimal