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 47921: Evaluate P(-1/2) if P(x) = 2x4 + x3 + 12
Click here to see answer by awhalen(4)

Question 48056: 4{[5(x-3)+2]-3[2(2x+5)-9]
Click here to see answer by tutorcecilia(2042)

Question 48111: Can someone help me with this problem?
I need to simplify the following expression:
6x^2y^3 + 9x^2y^3/3x^2y^2
Thanks,
Sher
Click here to see answer by Earlsdon(4900)

Question 48291: Could you please solve 4(7x+10)=3(9x-5)+20? I really need someone to go through each step for me. I can show you what I tried. 4(7x+10)=3(9x-5)+20
28x+40=27x-15+20
Click here to see answer by stanbon(26367)

Question 48299: use the order of operations to simplify the expression
(-3)^2-4^2/6 divided by 3*4-2
Click here to see answer by stanbon(26367)

Question 48501: IS the following binomial a difference of squares?
9a^2 - 8b^2

Thank You!
Click here to see answer by AnlytcPhil(958)

Question 48499: Multiply
(5a - 3b)^2
Is this correct 25a^2 - 9b^2
Thanks
Click here to see answer by tutorcecilia(2042)

Question 48685: use the variable expression 3x-1.
evaluate the expression when x= -3,-2,-1,0,1,2, and 3.
THANK YOU VERY MUCH I REALLY DO APPRECIATE IT.

Click here to see answer by AnlytcPhil(958)

Question 48777: can you please show me how to work this problem? 5[3(7-t)-4(8+2t)]-20=6[2(6+3t)-4] and 2+14x-9=7(2x+1)-14

Click here to see answer by stanbon(26367)

Question 48884This question is from textbook Elementary and Intermediate Algebra
: Lisa is coloring her creataion. The blue color used is 50% of the green color used, yellow is 5% of the blue color used, and brown is 7% of the amount of green used. She wants to find the total amount of color used by her.
a. Find the total amount of color used by Lisa using an algebraic expression.
b. Comment on the kind of terms of the algebraic expression.This question is from textbook Elementary and Intermediate Algebra

Click here to see answer by venugopalramana(3286)

Question 48962: Solve for x:
2x – 3 = -4
Click here to see answer by tutorcecilia(2042)

Question 48999: hey this is exactly what my worksheet says.
Simplifying Expressions.

1.(7x-2y+5)+(2x+5y-4)
2.(3x+5xy+2y)+(4-3xy-2x)
3.-2[2a-(4a-2)-2(7-3a)]
Click here to see answer by tutorcecilia(2042)

Question 49019: An equation that contains a variable is called what?
Click here to see answer by ikdeep(182)

Question 49019: An equation that contains a variable is called what?
Click here to see answer by AnlytcPhil(958)

Question 49066: Simplify the following equation by combining like terms:
3a(a – 5) + 5a(a + 2)

Click here to see answer by tutorcecilia(2042)

Question 49157: -2(-7n-3)-(n+5)
Click here to see answer by tutorcecilia(2042)

Question 49098: List the terms of the following expression.
2b2 + 7b + 10

Write the following phrase using symbols.
r decreased by by 8
is this the correct way to write it? r < 8
Click here to see answer by tutorcecilia(2042)

Question 49185: Hello,
My daughter has not received her book yet. This is 7th grade prealgebra. A word problem was written on the board as follows:
3 ducks and 2 ducklings weight 32 ounces, 4 ducks and 3 ducklins weigh 44 ounces. All the ducks weigh the same and all ducklings weigh the same. What would 2 ducks and 1 duckling weigh? He gave the following answer which we can not understand: (3D+2d=32)3=9D+6d=96; (4D+3d=44)-2=(-8D+-6d)=-88; 3(8)+2d=32, 24+2d=32, 24+2d-24=32-24, 2d=8, 2d*8=16d, 16d, d =4+16=20. Please help
____ ___ ___
2 2 4
Click here to see answer by Earlsdon(4900)

Question 49218: Simplify the following expression, if possible:

4 – (x –2)

Click here to see answer by KellyB(2)

Question 49254This question is from textbook

: 1/3(s-2)=s+4This question is from textbook

Click here to see answer by AnlytcPhil(958)

Question 49258: what is the answer to 21-13+8
Click here to see answer by checkley71(8405)

Question 49320: Give that T(x)=-2x^2-5x-8, evaluate :T(2)
Click here to see answer by Nate(3495)

Question 49320: Give that T(x)=-2x^2-5x-8, evaluate :T(2)
Click here to see answer by Osran_Shri(18)

Question 49412: The 7th grade math classes are going on a field trip> The field trip will cost $7 per student> Write an expression to find the cost of the field trip for s students. What is the total cost if 26 students go on the trip?
Click here to see answer by Nate(3495)

Question 49413: Kata has a savings account that contains$230. She decides to deposit $5 each month from her monthly earnings for baby-sitting after school. Write an expression to find how much money Kata will have in her savings account after x months. Let x represent the numberof months. Then find out how much she will have in her account after 1 year.
Click here to see answer by pwac(251)

Question 49439: Can someone help me with this problem?
I need to insert grouping symbols in the proper place so that the given value of the expression is obtained.
5 - 3 x 2 + 8 x 5 - 2; 28
Thanks,
Sher
Click here to see answer by stanbon(26367)

Question 49438: Can someone help me on this problem?
I need to evaluate the following expression:
[(2 + 3)^2 - 4 x 5] + 7
Thanks,
Sher
Click here to see answer by stanbon(26367)

Question 49438: Can someone help me on this problem?
I need to evaluate the following expression:
[(2 + 3)^2 - 4 x 5] + 7
Thanks,
Sher
Click here to see answer by Osran_Shri(18)

Question 49438: Can someone help me on this problem?
I need to evaluate the following expression:
[(2 + 3)^2 - 4 x 5] + 7
Thanks,
Sher
Click here to see answer by pwac(251)

Question 49533: Okay guys I think I got this but want to check with someone of "authority".
Simplify the following equations as much as possible:
10 + sqrt(16 - 9) / (4 / 2)^3
= (10 + √7) / 8
= 12.65 / 8
= 1.58
Thanks!!
Andrea

Click here to see answer by longjonsilver(2297)

Question 49532: 1. Find the values of the following expression for x = , y = -1 and z = 2:

(xyz^2)^3 / xyz
= (1/2 * -1 * 22)^3 / ½ * -1 * 2
= (1/2 * -1 * 4)^3 / -1
= (-2)3 / -1
= -8
Is this correct or did I interpret the question wrong? Your input would be appreciated.
Andrea
Click here to see answer by gsmani_iyer(161)

Question 49602This question is from textbook algerbra 1
: make this problem true
25 - 15 * 6 + 4 = 64
This question is from textbook algerbra 1

Click here to see answer by Earlsdon(4900)

Question 49498: evaluate
4(xx)-x+3 when x=-3

Click here to see answer by Juhi(44)

Question 49739: copy the expression as shown, add grouping symbols () so that the value of the expression is 24 when x=3, y=7, and z=21
Y + Z / 4 x X + X
(/) is for divide
Click here to see answer by alka(15)

Question 49876: x^2-36

(x-6)(x-6) is the answer we came up with. thanks for your input
Click here to see answer by stanbon(26367)

Question 49890: I am having trouble with this question:
Solve: 3t-4(5-t)=t-8

ISBN:0618372628
Click here to see answer by Juhi(44)

Question 50014This question is from textbook Algebra 2
: g/-3 greater than or equal to-9?

This question is from textbook Algebra 2

Click here to see answer by tutorcecilia(2042)

Question 50110This question is from textbook Intermediate Algebra

: What I really need is an explaination, I've posted the ISBN number of the text I'm using...although it does explain the order of operations on page 26 it does not explain it to the point I understand. For instance, one problem asked was to evaluate: -9-(-11)-4-(-6) by our instructor. To be quit frank I'm lost and need to understand the basic concepts starting at the bottom floor and not in the middle. However, since the college I am attending will not put me in a pre-algebra class to learn the basic's needed as I scored too high on the pre-math exam I stuck with intermediate algebra which starts me in the middle. I've also checked out other web sites for help and they don't explain it any better either, at least not simplified in steps as to why I'm suppost to do it that way, so I can understand it. I would greatly appreciate any help...thank you...littledarling55.This question is from textbook Intermediate Algebra

Click here to see answer by longjonsilver(2297)

Question 50107: 3-(5+1)-(1-4)
Click here to see answer by tutorcecilia(2042)

Question 50107: 3-(5+1)-(1-4)
Click here to see answer by stanbon(26367)

Question 50128: 15/t when t =5
Click here to see answer by tutorcecilia(2042)

Question 50128: 15/t when t =5
Click here to see answer by gloria3309(1)

Question 50166: (-15-20)+[8+(-3)-(-5)]

Click here to see answer by 4011(1)

Question 50374: Evaluate the expression.
-3m/t m=5/6 t=1/6
x/y x==2/5 y= 3/10

r/3s r=1/8 s=3/4 3x/5y x=1/5 y=-1/2
Click here to see answer by stanbon(26367)

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