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Tutors Answer Your Questions about Expressions-with-variables (FREE)
Question 93370: Please help don't understand, It says to tell whether each expression is a numerical expression or a variable expression. For a variable expression, name the variable.
1. 4d
2. _4(9)_
6
3. 5k-9
4 19+3(12)
5. 74+8
6. 14-p
7. 3+3+3+3
8. 25-9+x
how would you write a word phrase for each expression?
1. c+15
2. c-7
Click here to see answer by praseenakos@yahoo.com(417)  |
Question 93421This question is from textbook addison-wesley
: hello,
I would be extremely grateful for any help or advice for this problem. It has been extremely difficult for me as there is no fore-explanation on how to solve this type of problem.
it is in the section of Maximum and Minimum problems, I was not sure where to put it, I hope I got the right topic.
QUESTION:
A straight section of railroad track crosses two highways at points that are 400m and 600m, respectively, from an intersection.
Determine the Dimensions of the largest rectangular lot that can be laid out in the triangle formed by the railroad and highways.
now, I worked a few hours on this problem, coming to absolutely nothing.
I found the remaining side of the right triangle, at 721.1,
I tried any number of equations using variables, in the end coming up with 4(x-1/4L)²-1/2 meaning zilch without knowing L.
I tried graphing it and solving from there, coming up with a rough esimate of the answer.
I Know how to deal with turning into standard form and all that, but I just cannot seem to grasp which numbers I can use to come up with the (x²+1x+1)format, ... as you can see, I am very confused, any help that you can give will a lifesaver
yours truly,
Michael Demski
ps The answer from the book is 200m by 300m, I just don't know how to get there
This question is from textbook addison-wesley
Click here to see answer by stanbon(26259)  |
Question 94008This question is from textbook
: one side of a triangle is 1 in. longer than the shortest side and is 1 in. shorter than the longest side. the perimeter is 17 in. what is dimensions of triangle?
This question is from textbook
Click here to see answer by bucky(1732) |
Question 95001This question is from textbook Algebra Structure and Method Book 1
: ok. i am having trouble with my homework. i was wondering if you could help me?
ok. do you want the questions from the book? even if you dont, i provided them anyway.
our teacher said that we had to write the variable expression and not solve it. he also said that we were only allowed to use ONE variable. that is part of the reason im SOOO confused!
#16 the length of a rectangle is one unit more than its width. If the area is 30 square units, find the demensions of the rectangle.
#18 A triangle has two equal sides and a third side that is 15 cm long. If the perimeter is 50 cm, how long is each of the two equal sides?
#20 Tina, Dawn, and Harry have $175 together. Tina has three times as much money as Dawn. Dawn has twice as much money as Harry. How much money does each have?
#22 Teri has one-fourth as many canadian stamps as her father has in his collection. She has one-seventh as many Canadian stamps as her grandfather has. How many stamps do they each have if together they have 120 Canadian stamps?
i hope that helps! please try and respond in the next 9 hours!! if not, forget i ever wrote this to you! thank you for your time
-ME!!This question is from textbook Algebra Structure and Method Book 1
Click here to see answer by stanbon(26259) |
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