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Vikentia [17]
3 years ago
5

What is fifty seven minus nineteen

Mathematics
2 answers:
ruslelena [56]3 years ago
3 0
Babygorl it’s 38, hope this helps
Mkey [24]3 years ago
3 0

Answer:

Fifty seven minus nineteen is Thirty - eight

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What is the total resistance of a parallel circuit that has three loads? Load one has a resistance of 6 ohms. Load two has a res
gizmo_the_mogwai [7]

Answer:

The total resistance of these three resistors connected in parallel is 1.7143\Omega

Step-by-step explanation:

The attached image has the circuit for finding the total resistance. The circuit is composed by a voltage source and three resistors connected in parallel: R_1=6\Omega, R_2=3\Omega and R_3=12\Omega.

<u>First step: to find the source current</u>

The current that the source provides is the sum of the current that each resistor consumes. Keep in mind that the voltage is the same for the three resistors (R_1, R_2 and R_3).

I_{R_1}=\frac{V_S}{R_1}

I_{R_2}=\frac{V_S}{R_2}

I_{R_3}=\frac{V_S}{R_3}

The total current is:

I_S=I_{R_1}+I_{R_2}+I_{R_3}=\frac{V_S}{R_1}+\frac{V_S}{R_2}+\frac{V_S}{R_3}=\frac{R_2\cdot R_3 \cdot V_S+R_1\cdot R_3 \cdot V_S+R_1\cdot R_2 \cdot V_S}{R_1\cdot R_2\cdot R_3}

I_S=V_S\cdot \frac{R_2\cdot R_3+R_1\cdot R_3+R_1\cdot R_2}{R_1\cdot R_2\cdot R_3}

The total resistance (R_T) is the source voltage divided by the source current:

R_T=\frac{V_S}{I_S}

Now, replace I_S by the previous expression and the total resistance would be:

R_T=\frac{V_S}{V_S\cdot \frac{R_2\cdot R_3+R_1\cdot R_3+R_1\cdot R_2}{R_1\cdot R_2\cdot R_3}}

Simplify the expression and you must get:

R_T=\frac{R_1\cdot R_2\cdot R_3}{R_2\cdot R_3+R_1\cdot R_3+R_1\cdot R_2}

The last step is to replace the values of the resistors:

R_T=\frac{(6\Omega )\cdot (3\Omega)\cdot (12\Omega)}{(3\Omega)\cdot (12\Omega)+(6\Omega)\cdot (12\Omega)+(6\Omega)\cdot (3\Omega)}=\frac{12}{7}\Omega=1.7143\Omega

Thus, the total resistance of these three resistors connected in parallel is 1.7143\Omega

4 0
3 years ago
If a and b are positive integers and 22a(22b)=16, what is the value of a+b?
Kryger [21]
Given that:
<span>22a(22b)=16
484ab=16
thus
ab=16/484
ab=4/121
thus given that 
ab=4/121
then
a=4 and b=1/121
hence
4+1/121
=4 1/121</span>
8 0
3 years ago
The volume of a cylinder varies jointly with the square of its radius and with its height: V=kr^(2)h Cylinder A has a volume of
Brrunno [24]
We have the following equation:
 V = kr ^ (2) h
 For cylinder A we have:
 251.2 = k * ((4) ^ (2)) * (5)
 Let's clear k:
 k = 251.2 / (((4) ^ (2)) * (5))
 k = 3.14
 For cylinder B we have:
 V = 3.14 * ((3) ^ (2)) * (9)
 V = 254.34 in ^ 3
 Answer:
 the volume of cylinder B is:
 V = 254.34 in ^ 3
8 0
3 years ago
An​ alligator's tail​ length, T, varies directly as its body​ length, B. An alligator with a body length of 4.5 feet has a tail
Amiraneli [1.4K]
If and only if it is a proportional relationship, the problem can be solved by creating a proportion of B1/T1=B2/T2. This can also be expressed as 4.5/3.5=5.4/x given the values. You must cross multiply, so 4.5x=3.5(5.4). This simplifies to x=4.2. So, the tail length would be 4.2 feet.

Hope this helps.
3 0
3 years ago
59-__=16 can someone help??!
ankoles [38]

the answer is 43 .                                                  






from, izzy

3 0
3 years ago
Read 2 more answers
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