Algebra Homework Answers & Questions

Waiting for answer A ladder is 110 inches tall. How tall is it in feet and inch...
9 feet and 2 inches There 12 inches in one foot therefore 9 feet = 108 inches and 2 remaining. 9 feet 2 inches
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Waiting for answer What is the domain of the function ##f(x)=sqrt(6  2x)##?
In this case you do not want a negative argument for the square root (you cannot find the solution of a negative square root, at least as a real number). What you do it is to "impose" that the argument is always positive or zero (you know the square root of a positive number or zero). So you set t...
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Waiting for answer How do you find the Least common multiple of 20, 30?
##lcm(20,30)=60## multiples of 20:##" "{20,40,60,80,100,120,140,160,180..}## multiples of 30:##" "{30,60,90,120,150,180,...}## common multiples;##" "{60,120,180...}## ##lcm(20,30)...
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Waiting for answer How do you find the y coordinate of the vertex of a parabola...
The ycoordinate of the vertex of a parabola in ##y=ax^2 + bx + c## is ##k = (4ac  b^2)/(4a)## explanation: The vertex of a parabola, written in ##y= ax^2 + bx + c## , denoted by the ordered pair ( h, k ) in which h is the xcoordinate and k is the ycoordinate is obtained using the formulas bel...
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Waiting for answer Which lengths represent the lengths of the sides of a scalen...
##3,4,5" "## A scalene triangle by definition has three unequal sides. ##4,4,5 and 12,7, 7## are isosceles triangles because they have two equal sides . ##15,15,15 " "##is an...
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Waiting for answer How do you simplify Square root of 63  Square root of 28?
##sqrt (7)## ##sqrt (63)##  ##sqrt (28)## the factors of 63 are 7 and 9. 9 is a perfect square so therefore ##sqrt (63)## is ##3sqrt (7)## the factors of 28 are 7 and 4. 4...
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Waiting for answer The tallest man ever recorded was Robert Wadlow, who was 272...
247.52 centimeters. To find this answer, you have to find 91% of Robert Wadlow's height. To do that, you multiply 272 by 0.91, which gives you the height of Zeng Jinlian.
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Waiting for answer How do you solve a percent change equation?
You have to use this formula: %change = ((new amount  original amount) / original amount) x 100 For example, if you originally had an investment of $300 and 5 years later you had $326.25 in your account and you want to see the percent change, you'd use the formula above % change=((326.25300)/300...
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Waiting for answer Omar bought 10 pounds of rice for $6. How many dollars did h...
##0.6 $## we have : 10 pounds of rice ## 6$## 1 pound of rice ## x$## we need to find ##x## ##x/1 = 6/10  x = (6xx1)/10 = 3/5 = 0.6## I hope that was clear
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Waiting for answer Is ##4x^2 + 28x + 49## a perfect square trinomial and how do...
Yes it is. ##4x^2+28x+49 = (2x+7)^2## All perfect square trinomials are of the form: ##a^2+2ab+b^2 = (a+b)^2## In this case ##a = 2x## and ##b=7## ... ##4x^2+28x+49## ##=(2x)^...
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Waiting for answer How many mL is 1.06 L of water equivalent to ?
##1.06l xx1000 = 1060ml## To convert litres to millilitres, you multiply by 1000. If you convert to a smaller unit, the number gets bigger. ##1.06l xx1000 = 1060ml##
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Waiting for answer One inch is ##1/12## of a foot. Eunice has a puppy that is #...
Answer is 9 inches. If one inch is 1/12 of a foot, then 1 ft = 12 inches Through unit conversion, ##(3/4)(12)=9## inches
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Waiting for answer What are examples of non real numbers?
Any complex number of the form ##a+bi##, where ##a## and ##b## are real numbers and ##b ne 0##, are non real numbers. I hope that this was helpful.
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Waiting for answer What is the greatest common factor of 15, 30, and 45?
##15##. All of these numbers are divisible by ##15##, and ##15## is ##15##'s largest factor, so it must be the . ##15/15=1##. ##30/15=2##. ##45/15=3##.
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Waiting for answer How do you convert 12 kilograms to pounds using 1 kg = 2.2 l...
##26.4## lbs Conversions are always in direct proportion. More of one quantity means more of the other. Set up equivalent fractions and make sure you match the corresponding values...
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Waiting for answer What is the least common multiple of 6 and 8?
Lease Common Multiple is ##24##. Multiples of ##6## are ##{6,12,18,color(red)24,30,36,42,color(red)48.......}## Multiples of ##8## are ##{8,16,color(red)24,32,40,color(red)48..........
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Waiting for answer If y=6 for every value of x, can y be regarded as a functio...
Yes it can. A function is a mapping from one set (of numbers) to another. As long as each input gets mapped to only one output (e.g. the mapping doesn't take the input "3" and map...
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Waiting for answer How do you write ##400## in exponential notation?
See explanation. ##400=4xx10^2## To write a number in scientific (exponential) notation you "move" the decimal point until you get a number between 1 and 10 and multiply this number...
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Waiting for answer Who invented algebra?
It is incorrectly thought that the East Indians and Arabs developed algebra, but the original developers were the Ancient Greeks. The way they thought was more rigorous than anything one might learn in algebra. To acquire a very deep understanding, you should study the following: Euclid's Elemen...
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Waiting for answer What is a multiple of 2 and 7?
A multiple of ##2## and ##7## is a number that is divisible by both ##2## and ##7## Multiply ##2## and ##7## ##2times7## = ##14## All multiples of ##14## are the multiples of ##2#...
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