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

Tutors Answer Your Questions about expressions (FREE)

Question 122597: How would I combine the like terms?
9u+6v-10u
Click here to see answer by jim_thompson5910(28476)

Question 122601: How would I evaluate -15+6/3?
Click here to see answer by jim_thompson5910(28476)

Question 122593: Evaluate: (15-5)divided by [(12 divided by 2^2)-2]?
Click here to see answer by madhan_math(34)

Question 122978: My professor wants us to use order of operations to get the answer, im not sure if im doing it correct, for this expression i got -8 but not sure if it's right please can someone help thank you.
-8-3(+3)
Click here to see answer by checkley71(8403)

Question 123385: 4+2(x-8)
Click here to see answer by MathLover1(6613)

Question 123379: Please solve:
n+2(7+3n)-3n
which has the same value:
2(7+n)
n+14
14+3n
2(7+2n)
21n-3n
my answer is 2(7+2n) which will work out to be: 4n+14.
is this correct?
thanks.
Click here to see answer by MathLover1(6613)

Question 123380: Please solve:
The sum of a number (x) and 12 is multiplied by 10 then increases 15,
which numerical expressions represent this statment, follow by the correct
answer, if x=3.
1) (x+12*10)+15;138
2) x+(12*10)+15;165
3) (10x+12)+15;57
4) x+12*10+15;138
5) (x+12)10+15; 165
I chosen the answer number 5, Is this correct?
thanks,
Click here to see answer by praseenakos@yahoo.com(507)

Question 123921: How do I write 243 in exponential notation
Click here to see answer by checkley71(8403)

Question 123987: Please help solve this
4x^3(-2x^3)^4
Click here to see answer by johnnico6426(16)

Question 124062: hi
can you please help me with math
how do you solve 57=a-40
and tell me how you got there with the awnser
Click here to see answer by stanbon(57216)

Question 124246: A rectangle has sides of 3x – 4 and 7x + 10. Find the expression that represents its perimeter.
Click here to see answer by solver91311(16868)

Question 124246: A rectangle has sides of 3x – 4 and 7x + 10. Find the expression that represents its perimeter.
Click here to see answer by MathLover1(6613)

Question 124342: (Nine more than the product 4 and the number is 73). I am helping my niece and I am stumped, Help.....
Click here to see answer by bucky(2189)

Question 124705: The area of a square is 25 square meters. What is its perimeter?

Click here to see answer by checkley71(8403)

Question 124707: A concrete driveway measures 18 yards by 4 yards. The driveway will be 0.5 yards thick. (a) How many cubic yards of concrete will be needed? (b) How much will it cost if concrete is $3.50 per cubic yard?

Click here to see answer by checkley71(8403)

Question 124973: how step by step I can simplify this example
(2a)(5a)(6a)
Click here to see answer by chitra(359)

Question 125062: I am trying to write this without parentheses

Click here to see answer by checkley71(8403)

Question 125065: I am trying to simplify the following

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Question 125065: I am trying to simplify the following

Click here to see answer by edjones(7569)

Question 125068: I am trying to simplify the following

Click here to see answer by Fombitz(13828)

Question 125110: PLEASE HELP

The lenght of a rectangle is 1ft more then twice its width, and the area of the rectangle is 45ft^2. I am trying to find the diensions of the rectangle.
Length _____ft
Width _____ft
THANK YOU IN ADVANCE
Click here to see answer by checkley71(8403)

Question 125678: I am stuck with this one :
Q. Express in index form 1 divided by the square root of x
Q. Express in index form the square root to the power of 4 of x to the power of 5

Click here to see answer by solver91311(16868)

Question 125714: how to write a numerical expression for the phrase and simplify it
13 less than the difference between 8 and -5 is what?
Click here to see answer by stanbon(57216)

Question 125952: I'm very confused on how to work this D=RT problem. The problem is as follows "A bus leaves Miami for San Francisco traveling at a rate of 40 mph. Three hours later a car leaves Miami for San Francisco traveling at 55 mph. How far from Miama does the car overtake the bus?
My formula: 40x+55(x-3)=x
40x+55x-165=x
95x-165=x
I know this cannot be right, please help..
Click here to see answer by josmiceli(9647)

Question 125960: If the sides of a square are decreased by 2, then the area is decreased by 36. what were the dimensions of the original square?
Click here to see answer by MathLover1(6613)

Question 126173: I have this expression
square root of -144
which would be 12 12
break it out further it would be -3*4 and -3*4
so than it would be -4 square root 3?
These kind of problems play with your head. Is this correct?
Click here to see answer by stanbon(57216)

Question 126398: What is the difference in parentheses versus brackets and when do you use each with regards to interval notation?
Click here to see answer by ilana(307)

Question 126398: What is the difference in parentheses versus brackets and when do you use each with regards to interval notation?
Click here to see answer by stanbon(57216)

Question 126809: Can you help me solve this problem?
8+5
---
t
Click here to see answer by stanbon(57216)

Question 124830: what is 3+7x+x
Click here to see answer by apachemexican1(64)

Question 112628: 9x+7=5x-3
please explain.
Click here to see answer by apachemexican1(64)

Question 112628: 9x+7=5x-3
please explain.
Click here to see answer by jim_thompson5910(28476)

Question 127004: find three consecutive integers such that 3 times the sqaure of the first exceeds the product of the other two by 25
Click here to see answer by solver91311(16868)

Question 127000: Factor:
x^2 +5x-36=

Click here to see answer by jim_thompson5910(28476)

Question 127001: Factor:
X^2+8x=0
Click here to see answer by jim_thompson5910(28476)

Question 127003: 2x^2=10-x
Click here to see answer by checkley71(8403)

Question 121406: -15+ 30 x 2
Click here to see answer by awang1996(50)

Question 127593: If y(x-1)=z then x=
NEED SOME ASSISTANCE, THANKS
Click here to see answer by josmiceli(9647)

Question 127774: 23-5(3-x)=-4(x-2)

Click here to see answer by Ahha(5)

Question 128292: if T=a+(n-1)d find t when a=16 n=11 and d=6
find t when a=20 n=6 and d=-2
please help me im stuck!!!
Click here to see answer by oscargut(891)

Question 128292: if T=a+(n-1)d find t when a=16 n=11 and d=6
find t when a=20 n=6 and d=-2
please help me im stuck!!!
Click here to see answer by stanbon(57216)

Question 128289: hi!
if S= a over 1-r find s when a=10 and r=1/2
find s when a=4 and r=1/5

Click here to see answer by JessicaGill(40)

Question 128784: I need help understanding how to simplify expressions using fractions. I am not understanding the first step I need to do. Here is an example problem:
1/2(3a-8)+1/3(2a-9)

Click here to see answer by checkley71(8403)

Question 128838:
Simplify the exponential expression.
(.25xy)(-20x^-1y^-5)
Click here to see answer by checkley71(8403)

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