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Tutors Answer Your Questions about expressions (FREE)
Question 158854: Hi. I am confused about the correct order of operation for the following problem:
"Evaluate the expression  WHEN y = 1/7, x = 2/7"
The given answer 10/49, but I argue it is 5/2. Could you help?
Thank you
(Please note that in the original problem, a fraction bar is not used and a division sign is. Also, the "10 times x" above was originally written "10x." Does this make a difference?)
Click here to see answer by ranjithraghuram(4)   |
Question 159668: MY DAUGHTER IS HAVING TROUBLE WITH EVALUATING EXPRESSIONS AND COMBINING LIKE TERMS. HERE IS ONE OF HER PROBLEMS: -6r - 10s + 8r + 4s - 6 = ?
I HOPE YOU CAN HELP HER UNDERSTAND HOW TO DO THIS PROBLEM. THANK YOU
Click here to see answer by nerdybill(2448)  |
Question 160268: I have an exponential equation - not sure if I went about it in the right way or not...
(125/8)^x+1 = (2/5)^x-1
for want of a better way of doing things I decided to make both values inside the parentheses to be divided by the same thing thus
(625/40)^x+1 = (16/40)^x-1
then decided to combine to get the exponentials from x+1 - (x-1) to = 2
and then combining the other to give me a final answer of (609/40)^2
Is this correct or how else should I do this please?
Click here to see answer by Edwin McCravy(2922) |
Question 160592: These are my homework questions that I am confused on.
Quetion 1
If x is any real number, is this always true? Show why or why not.
square root of x^2 = x
I say no because if x is a negative number than the square result would not be a negative number.
Question 2
If a and b are real numbers and a^2 = b^2, explain your answer.
I say yes because if a and b are equal in the beginning, then if you do the same to each of them then they will still be equal.
Thank you for your help.
Click here to see answer by Fombitz(2113)  |
Question 160592: These are my homework questions that I am confused on.
Quetion 1
If x is any real number, is this always true? Show why or why not.
square root of x^2 = x
I say no because if x is a negative number than the square result would not be a negative number.
Question 2
If a and b are real numbers and a^2 = b^2, explain your answer.
I say yes because if a and b are equal in the beginning, then if you do the same to each of them then they will still be equal.
Thank you for your help.
Click here to see answer by MathLover1(1183)  |
Question 160913This question is from textbook algebra 1
: I wasnt sure which it was, on the above question.
So i am in Algebra 1, reviewing chapter 2.
I was wondering, if you can helping me with this problem.
-5a-7+4a=-(a-7)
i sort of understanda but i get stuck where theres a variable and number such as 4h=4h+4 <-- then that on the otherside. im just confused on what to do from there.This question is from textbook algebra 1
Click here to see answer by stanbon(26297) |
Question 161152: 3. A discount store takes 50% off of the retail price of a desk. For the store's holiday sale, it takes an additional 20% off of all furniture. The desk's retail price was $320. How much is the desk on sale for during the holiday sale?
Please show this is done...!!!
Click here to see answer by jojo14344(1483) |
Question 161151: 3. A discount store takes 50% off of the retail price of a desk. For the store's holiday sale, it takes an additional 20% off of all furniture. The desk's retail price was $320. How much is the desk on sale for during the holiday sale?
Click here to see answer by jojo14344(1483) |
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