Homework answers and tutorials

Waiting for answer How do you graph the inequality ##3x+4y<=12##?
Graph the line of ##(3x+4y=12)## using two arbitrary solutions; then shade in the side of the line containing the point ##(0,0)## ##3x+4y =12## includes all points on the line ##3x+4...
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Waiting for answer Why is law of definite proportions important?
Because it defines that all water molecules are ##H_2O##, for example. The law of definite proportions dictates that a name is always associated with a specific ratio of found in a...
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Waiting for answer When solutions of silver nitrate and potassium chloride are...
Since you've got the first part, I'll just answer the second question, so to speak. So, you've got your balanced chemical equation for this reaction ##AgNO_(3(aq)) + KCl_((aq))  AgCl_((s)) + KNO_(3(aq))## You know that you have a ##"1:1"## between all the species involved. This means that t...
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Waiting for answer What percent of 20 is 4?
20% Very detailed answer. Shows 2 methods and also explains the difference between fraction and ratio Using the shortcut method If I were to be answering this for my self it would l...
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Waiting for answer How do you find the slope of the line whose equation is ##2x...
The of the line is ##1/2##. The equation of a line in is ##y=mx + b##, where ##m## is the slope, ##b## is the yintercept, and ##x## and ##y## are a point on the line. In order to determine the slope from the given equation, do the following: ##2x  4y = 10## (Subtract ##2x## from both sides.)...
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Waiting for answer How do the central and peripheral nervous system work togeth...
The Central Nervous System (CNS) and Peripheral Nervous System (PNS) work together in a multitude of ways. The PNS is ultimately the extension of the CNS. By simple definition, the CNS is located in the spine and in the skull. The PNS in simple definition is everything else. The CNS does the bulk...
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Waiting for answer How do you convert (x3)squared +(y+4)squared =25 to a polar...
##r=2(3 cos theta  4 sin theta )##. Graph is inserted. The conversion formula is ##(x, y)=r(cos theta, sin theta)## So, the polar equation is (r cos theta 3 )^2+(r sin theta + 4...
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Waiting for answer A card is drawn from a standard deck of 52 playing cards. Wh...
##2/13## There are 52 cards in a standard deck: 13 ordinal cards (Ace  10, Jack, Queen, King) and 4 of them  one to each suit (hearts, diamonds, clubs, spades) and so we have ##4xx...
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Waiting for answer What is the SI for a unit of power?
is measured in watts. A watt is the power that it takes to do one joule of in one second. It can be found using the formula ##P = W / t##. (In this formula, W stands for "work.") Large amounts of can be measured in kilowatts (##1 kW = 1 \times 10^3 W##), megawatts (##1 MW = 1 \times 10^6 W##),...
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Waiting for answer What is the difference between an oxymoron and antithesis?
An oxymoron is a phrase that uses two contradictory or opposing terms, while an antithesis is a device that presents two contrasting ideas in a sentence (but not in the same phrase)....
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Waiting for answer How many pints of blood are in a woman's body?
The average woman has nine to ten pints of blood in her body. Per the American Red Cross, the average adult has 10 pints of blood, depending on weight. Men average 10 to 11 pints a...
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Waiting for answer Which is more stable, cis 1ethyl2methylcyclohexane or t...
The more stable of the two will be trans1ethyl2methylcyclohexane , and here's why that would be. I'll compare the two most stable for each molecule. If you want to see why these chairs are the most stable Now, here's the most stable chair conformer for trans1ethyl2methylcyclohexane Notice th...
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Waiting for answer What is the derivative of ##f(theta)=arcsin(sqrt(sin(9theta)...
##(df)/(d theta) = 9/2 * cos(9theta)/(sqrt(sin(9theta)) * sqrt(1  sin(9theta)))## You can differentiate this function by using , provided that you don't know what the derivative of...
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Waiting for answer How small is Earth compared to the largest known star?
Largest known star UY Scuti is 1708 times bigger than SUn.by Radius. Suns radius is 696265 Kilometers. Earth's radius is 6378.KM
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Waiting for answer How are fungi helpful to humans and how are they harmful?
Fungi are helpful to us in the products they produce but may also be harmful for the diseases they cause. Helpful fungi may be edible Portabella mushrooms Button cap mushrooms Shitake mushrooms Where I live, people search for sponge fungi or morels Helpful fungi may produce products we can us...
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Waiting for answer How do you find the derivative of ##ln(x/(x^2+1))##?
##f'(x)=(1x^2)/(x^3+x)## The easiest way is to first rewrite the function using properties of logarithms. Recall that ##log(a/b)=log(a)log(b)##. ##f(x)=ln(x/(x^2+1))## ##f(x)=ln...
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Waiting for answer Will a change in the amino acid sequence of a polypeptide ch...
Not always, it depends on where the aminoacid is located and how different it is from the normal one. Proteins, or polypeptides, are molecules with a complex structure. There are fo...
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Waiting for answer Why are Arrhenius acids strong electrolytes?
Arrhenius acids aren't necessarily strong electrolytes. An Arrhenius acid is a compound that gives off H+ ions when dissolved in water. like HCl, HF, and ##HNO_3## are all Arrhenius acids. A compound that gives off ions is considered a strong electrolyte if it completely dissociates in water....
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Waiting for answer How to simplify square root of 98  the square root of 50 ...
##4sqrt(2)## ##sqrt98sqrt50sqrt72## =##sqrt(49*2)sqrt(25*2)sqrt(36*2) ## factor the greatest perfect square factor. =##sqrt(49)*sqrt(2)sqrt(25)*sqrt(2)sqrt(36)*sqrt(2) ##...
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Waiting for answer Is ##x^12y^12## difference of two squares or difference of...
It could be both, actually. You can use the properties of exponential powers to write those terms both as a difference of squares, and as a difference of cubes. Since ##(a^x)^y = a^(xy)##, you can say that ##x^(12) = x^(6 * color(red)(2)) = (x^(6))^(color(red)(2))## and ##y^(12) = (y^(6))^(c...
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