Questions on Algebra: Evaluation of expressions, parentheses answered by real tutors!

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Algebra: Evaluation of expressions, parentheses

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Question 183548: W/2=negative 24

Click here to see answer by jim_thompson5910(13794)

Question 183742: Find an expression in terms of (x) for 150% of 4y+6 if (x) is 40% of 2y+3.
I am so lost on this one.
Click here to see answer by math_il(6)

Question 184494: -3-4(t-5)=-2(t+3)+11
0.08x+0.5(x+100)=73.2
Click here to see answer by checkley77(7072)

Question 185232: (12y +4x)+(15x+5)
Click here to see answer by feliz1965(151)

Question 185319: two trains leave at the same time from stations that are 60Km apart. the train travel towards each other, one at 55 Km/h and the other at 65 Km/h. At the same time a bee flying at a constant rate of 80 Km/h starts at the front of one train, flies to the front of the other train, inmediately turns and flies back to the front of the first train, and so on.When the two trains meet, what is the total distance that the bee will have flown?
Click here to see answer by Alan3354(6097)

Question 185857: -7 - 8 + 5 + (-2) - 6 = ?
I tried to do this problem but I'm not confident that I'm doing it correctly. Please show your work so I can better understand how to solve it.
Thank you
Click here to see answer by jim_thompson5910(13794)

Question 185981: I realize some of these look easy but when you haven't had algebra for so long it looks hard to me/ I also appreciate your help, without you guys I would be Sc-----.
Please evaluate the following and if so can you explain your steps.
X^2 -5X + 7 when X = -2
Click here to see answer by ptaylor(1578)

Question 186318: 32/4+16-4*3=4
This problem must be solved using only 1 set of parenthesis.
Everyone in my family has tried and we can't get it.

Click here to see answer by scott8148(3385)

Question 186318: 32/4+16-4*3=4
This problem must be solved using only 1 set of parenthesis.
Everyone in my family has tried and we can't get it.

Click here to see answer by nerdybill(2448)

Question 188253: The product of the sum of twice a number and three and two more than the number
Click here to see answer by Alan3354(6097)

Question 188454This question is from textbook
: This question is from textbook

Click here to see answer by Alan3354(6097)

Question 188575: please help with this problem that contains parentheses. please solve

(5+4b)^2

thanks
Click here to see answer by Mathtut(3670)

Question 188699: -7=-35
shouldn't this be a positive 5. two negatives should equal a positive if my memory serves me correctly.
Click here to see answer by Alan3354(6097)

Question 188723: USE >, =, or < for ? to form a true sentence.
3 over 8 ? - 13over 16
Click here to see answer by Earlsdon(4900)

Question 188720: in 2001, there was an estimated 900 million cell phone users and 600 million PC users in the world. what is the ratio of PC users to cell phone user?
Click here to see answer by Earlsdon(4900)

Question 188719: claude's college tuition was 4200. a loan was obtained for 2/3 of the tuition. for how much was the loan?
Click here to see answer by stanbon(26297)

Question 188789This question is from textbook Calculus:Early Transcendential Functions
: I started the problem, but not sure if i did it right and I'm not exactly sure what the question is asking me to do. I was given a formula and guessed how to get the answer. Any help is much appreciated!
Problem as stated on homework:
1.) A simple model for the mutual potential energy, V, of a pair of inert gas atoms is the Lennard-Jones function, , where r is the distance between the atonms and E and a are positive constants (E having units of energy, while a has units of distance).
a.) At what distance between the atoms is the potential enery a minimum?
I looked up some info on Wikipedia and found that
F.Y.I.in the numerators r is regular size and 'min' is subscript.
then where is the distance at the minimum of the potential.
b.)What is the value of the potential energy?
If if i did the first part wrong, my answer will be wrong here. Also, i don't know how to get a number value from the equation above...
Thank you very much for any help! If anyone could please send this to me by the sometimes tonight. I have to turn it in by 3:15pm on monday.This question is from textbook Calculus:Early Transcendential Functions

Click here to see answer by Alan3354(6097)

Question 188917This question is from textbook Structure and Method Book 1

: 10x^2-30x+20/x^2-1This question is from textbook Structure and Method Book 1

Click here to see answer by Mathtut(3670)

Question 189065: 8*2/3/2
I'm not sure how to go about solving this, I keep getting stuck. Please help thank you.
Click here to see answer by nerdybill(2448)

Question 190269: How do you write this mathematical expression using parentheses and brackets.
"Subtract 6 from 16. Divide this difference by 5. Multiply this quotient by 8."

Click here to see answer by stanbon(26297)

Question 190397: write as a mathematical expression using parentheses and brackets. then evaluate: "substract 6 from 16. divide the difference by 5. multiply this quotient by 8"
Click here to see answer by orca(409)

Question 190842This question is from textbook Intermediate Algebra an Applied Approach
: We are working on logarithms. This was added to our prefinal homework. I am so confused at this point.

Given F(x) = 3x-2, evaluate the following.
a. F(-4)
b. F(-1)
c. F(0)
Here is what i've done so far after several attempts I keep doing it different and confusing myself. I need to understand as finals are next week. Thank you for any help.
f(F,x)=3^(x-2),F(-4)
Evaluate F(-4) by replacing x with -4 in the function.
F(-4)=3^((-4)-2)
F(-4)=(1)/(729)

((1)/(729))
This question is from textbook Intermediate Algebra an Applied Approach

Click here to see answer by jim_thompson5910(13794)

Question 191041This question is from textbook Intermediate Algebra an Applied Approach
: Every time I work these I get lost. I'm working out review of a crash class (7weeks) to take a final Friday and my confidence of understanding these is still not good.
Given f(x) = e-2x + 1, evaluate the following. Round to the nearest ten-thousandth.
f(-1)
f(3)
f(-2)
Show your work here:
f(-1)=e -2(-1)+1=x-1
f(-1)=e^2+1
f(-1)=7.389+1
f(-1) = 8.389
This question is from textbook Intermediate Algebra an Applied Approach

Click here to see answer by solver91311(5072)

Question 191309: (7-2)/5
Click here to see answer by jim_thompson5910(13794)

Question 191650: please help me evaluate this problem

What is d(3a+c)

if a is -2..if b= -1 c= 2 abd d= one fourth

thanks
Click here to see answer by nerdybill(2448)

Question 191660: please help me evaluate

d(ab-c)

when a = -2 b = -1 c=2 and d = 1 fourth

thanks
Click here to see answer by RAY100(1637)

Question 191673: please help me evaluate this problem.

(ac+b)^3

a= -2 b = -1 c=2 and d = 1 fourth

thank you

--Tommy
Click here to see answer by jim_thompson5910(13794)

Question 191697: factor expression completely
2n^2-3mn+m^2
Click here to see answer by Mathtut(3670)

Question 192385: A pet store manager had 80 gold fish in stock, she brought G more gold fish which expression can be used to model the number of gold fish she has now?
Click here to see answer by edjones(3298)

Question 192680: How do I solve 2t squared minus 6t minus 20 equal zero
How do I solve y=(2x + 3)(minus 5)?
how do I solve x squared + 2x=8
What is the factored form of 3x squared plus 11x-4

The Teacher did not hand out Math books. Therefore, I cannot provide you with an ISBN
Click here to see answer by stanbon(26297)

Question 192902: Evaluate the expression -12(2x-1)-x^2 if x = -3

A= 75 B= 38 C = -45 or D = -57

thank you
Click here to see answer by stanbon(26297)

Question 193313: I HAVE A PLACEMENT TEST AND THIS QUESTION IS TOUGH FOR ME HOW DO I ANSWER
2X^2+3XY-4Y^2 WHEN X=2 AND Y=-4 I HAVE TRIED MANY TIMES BUT I CANNOT FIGURE IT OUT!! PLEASE HELP ME SO I PASS THIS TEST!!
Click here to see answer by nerdybill(2448)

Question 193322:
Click here to see answer by Mathtut(3670)

Question 193375: x^2 + x-20/ x^2 -16 Find answer in lowest terms

answer x+5/x+4
need a full break down of how the answer came about because i got a different answer i got was x+5/4 what did i do wrong ?
Click here to see answer by yuendatlo(23)

Question 193421: A=h(a+b)/2
Click here to see answer by Alan3354(6097)

Question 193585: x^2 + x -20/x^2 -16

answer:x+5/x+4
why is the answer x+5/ x+4 anyone can give a full break down why
Click here to see answer by Alan3354(6097)

Question 193587: 1/y + 1/y+2
divided by
1/y- 1/y+2

answer:y+1 i think my text book is wrong anyone know if this is the right answer and if it is can u give a full break down on why the answer is y+1
Click here to see answer by stanbon(26297)

Question 193581: 5^-1 + 2^-1-3^0.
ANSWER: -3/10
anyone knows why the answer is -3/10 please give a full break down
Click here to see answer by orca(409)

Question 193722: T^2 - 2T=15

answer (-3,5)
need a full break down on why the answer is -3,5
Click here to see answer by Mathtut(3670)

Question 193722: T^2 - 2T=15

answer (-3,5)
need a full break down on why the answer is -3,5
Click here to see answer by Earlsdon(4900)

Question 193726: z^2/ z-3 - z/z+3

answer: z3 + 2z^2 + 3z/ (z-3) (z+3)
anyone can give me a full break down on why the answer is z3 +2z^2 +3z
Click here to see answer by jim_thompson5910(13794)

Question 193726: z^2/ z-3 - z/z+3

answer: z3 + 2z^2 + 3z/ (z-3) (z+3)
anyone can give me a full break down on why the answer is z3 +2z^2 +3z
Click here to see answer by RAY100(1637)

Question 193737: express [-2,6] as a set using absolute value and an equality
Click here to see answer by user_dude2008(716)

Question 193736: Express [-1,9] as a set using absolute value and an inequality
Click here to see answer by user_dude2008(716)

Question 194332This question is from textbook
: z^2 - 11z + 24This question is from textbook

Click here to see answer by user_dude2008(716)

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