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

Algebra ->  Expressions -> Questions on Algebra: Evaluation of expressions, parentheses answered by real tutors!      Log On


   



Tutors Answer Your Questions about expressions (FREE)


Question 1044312: Write an expression representing the volume of the composite figure formed by a hemisphere with radius r and a cube with the side length 2r
Click here to see answer by ikleyn(52832) About Me 

Question 1044397: How do I evaluate3(2-1)-8(7-)

Click here to see answer by Alan3354(69443) About Me 

Question 1044445: Find the angle of inclination of 4x-3y+11=0
What? How? What is the angle of inclination anyway?

Click here to see answer by josgarithmetic(39623) About Me 

Question 1044444: Solve for x:
x^2+3(1-x)=4-3x^2
Thanks!

Click here to see answer by josgarithmetic(39623) About Me 
Question 1044444: Solve for x:
x^2+3(1-x)=4-3x^2
Thanks!

Click here to see answer by MathTherapy(10555) About Me 

Question 1044535: what does the expression 3s + 2p represent
Click here to see answer by Alan3354(69443) About Me 

Question 1044719: How do I expand +%284a-2%29%5E2+ ?
I have the answer to the problem which is 16a%5E2-16a%2B4 but I don't know exactly how to get to that.

Click here to see answer by josgarithmetic(39623) About Me 
Question 1044719: How do I expand +%284a-2%29%5E2+ ?
I have the answer to the problem which is 16a%5E2-16a%2B4 but I don't know exactly how to get to that.

Click here to see answer by ikleyn(52832) About Me 

Question 1044742: Evaluate -9 the second power
Click here to see answer by ikleyn(52832) About Me 
Question 1044742: Evaluate -9 the second power
Click here to see answer by jim_thompson5910(35256) About Me 

Question 1044983: 4.24 times 10 to the power of 2

Click here to see answer by rfer(16322) About Me 

Question 1045286: given the function defined by k(x)= x+7 find k(x+1)
Click here to see answer by josgarithmetic(39623) About Me 

Question 1045380: two positive numbers differ by 4 and square of their sum is 324. Find the numbers.
Click here to see answer by josgarithmetic(39623) About Me 

Question 1045745: Please help solve the problem: 1/x = x/1 if?
Click here to see answer by MathLover1(20850) About Me 

Question 1045750: Your neighbor has a square-shaped pool with side lengths of 3a^5. What is the area of the pool
Click here to see answer by MathLover1(20850) About Me 

Question 1045788: write the phrase as an algebraic expression and simplify if possible."the difference of twelve and twice a number, divided by 6"
Click here to see answer by josgarithmetic(39623) About Me 
Question 1045788: write the phrase as an algebraic expression and simplify if possible."the difference of twelve and twice a number, divided by 6"
Click here to see answer by Theo(13342) About Me 

Question 1046113: ashley paid a $900.50 bill for four new tires. this included $217 for each of the new tires and $26 an hour for installation. find the number of hours it took to install the new tires.
Click here to see answer by rfer(16322) About Me 

Question 1046107: Ashley paid a $900.50 bill for four new tires. This included $217 for each of the new tires and $26 an hour for installation. Find the number of hours it took to install the new tires.
Click here to see answer by ewatrrr(24785) About Me 

Question 1046305: There are two integers one is 5 more than a number and the other is 1 less than the same number
A) write expressions for two numbers
B) write a polynomial expression for the product of the number

Click here to see answer by ankor@dixie-net.com(22740) About Me 

Question 1046673: negative 3 times the difference of a number and 3. Write the expression and simplify it
Click here to see answer by Alan3354(69443) About Me 

Question 1046717: C=24n+35.
Click here to see answer by ikleyn(52832) About Me 

Question 1046824: If z=3+2i evaluate z^4-z^3+z^2-z+1
Click here to see answer by Alan3354(69443) About Me 

Question 1046896: 2(x-10)/3=x/3
Click here to see answer by josgarithmetic(39623) About Me 

Question 1046908: 2x +3 = 5x - 9
Click here to see answer by addingup(3677) About Me 

Question 1047322: The function f is defined by f(x)=3x^2+4x
Find f(4n)
---------------------------------------------------

f(4n)=3(4n)^2+4(4n)
What I did is: 3((4n)(4n))+4(4n)
3(16+4n+4n+n^2)+4(4n)
48+12n+12n+3n^2+16n
48+24n+3n^2+16n
But I also did this:12n^2+4(4n)
12n^2+16n

I am not sure which answer is correct. I believe what
confuses me is the question if whether I should factor out 3(4n)^2
For example: 3(4n)^2= 3((4n)(4n)) =3(16+4n+4n+n^2)
I know I should simplify but the exponent confuseso me.
Please help me solve the problem.

Click here to see answer by ikleyn(52832) About Me 

Question 1047508: You have 3x+4 hours of homework. You complete x-2 hours of work. How much homework do you have left. Write an expression to represent the amount of homework remaining. And solve.
Click here to see answer by ikleyn(52832) About Me 

Question 1047533: In a popolation,0.03% of the people have physical trait X.On the average,it will be necessary to screen how many people to find six with trait X?
Click here to see answer by robertb(5830) About Me 

Question 1047688: Equivalent expression of 4x - 8

Click here to see answer by ewatrrr(24785) About Me 

Question 1047830: (X+1)2-5 when x=-3
Click here to see answer by ewatrrr(24785) About Me 

Question 1047736: Use the commutative and associative properties as needed to simplify the expression.
3/4+(5/4+y)

Click here to see answer by ewatrrr(24785) About Me 

Question 1047735: Write the phrase as an algebraic expression and simplify if possible. Let x represent the unknown number.
The sum of 3, four times a​ number, −9​, and five times a number

Click here to see answer by ewatrrr(24785) About Me 

Question 1047734: Write the following as an algebraic expression. Simplify if possible. please
subtract 3x-10 from x-1

Click here to see answer by ewatrrr(24785) About Me 
Question 1047734: Write the following as an algebraic expression. Simplify if possible. please
subtract 3x-10 from x-1

Click here to see answer by advanced_Learner(501) About Me 

Question 1048201: |(-1)-(-3)|
Click here to see answer by Alan3354(69443) About Me 

Question 1048379: For all positive integers x and y such that 1/x + 1/y = 1/12, find the greatest value that y can have.
What is the way to do this? Thanks!

Click here to see answer by josgarithmetic(39623) About Me 
Question 1048379: For all positive integers x and y such that 1/x + 1/y = 1/12, find the greatest value that y can have.
What is the way to do this? Thanks!

Click here to see answer by robertb(5830) About Me 

Question 1048472: Joe wants to earn at least
$60
trimming trees. He charges
$7
per hour and pays
$3
in equipment fees. What are the possible numbers of hours Joe could trim trees?
Use
t
for the number of hours.
Write your answer as an inequality solved for
t
.

Click here to see answer by rfer(16322) About Me 

Question 1048514: Evaluate the following expression when x=-3.

x^4-3x^2+4x-12
please show steps


Click here to see answer by Alan3354(69443) About Me 

Question 1048841: We have a pre algebra problem we are trying to understand.
it goes as -2(5-6)+10 (6-7)- 25 divided by 5= the book states the
answer is -13 while we end up with -7. How is the answer -13.

Click here to see answer by josgarithmetic(39623) About Me 
Question 1048841: We have a pre algebra problem we are trying to understand.
it goes as -2(5-6)+10 (6-7)- 25 divided by 5= the book states the
answer is -13 while we end up with -7. How is the answer -13.

Click here to see answer by rothauserc(4718) About Me 

Question 1048911: Insert parentheses in the expression 5 + 3^2 - 4 x 2 in two ways: (a) so that the value is 12 and (B) so that the value is 20.
Click here to see answer by chen.aavaz(62) About Me 

Question 1049122: I'm trying to evaluate xy for this set of values. I'm not sure if I should add or multiply. X=2,y=-3
Click here to see answer by solver91311(24713) About Me 

Question 1049137: 1.What is the value of the expression when c=-1 and d=16 3c^2+d/2
2.What is the value of the expression when x=5 and y=-2 (5x+2y)/(x-2)
3.Miss Griggs ran at a rate of 3 mph for 2.5 hours. If d=rt, where d is distance, r is rate, and t is time, find how far Miss Griggs ran. Show all your work.
4.Is n=7 a solution to the equation 6=2n-8? Show your work to prove your answer

Click here to see answer by josgarithmetic(39623) About Me 

Question 1049459: Factorise 9t^2-5r^2
Click here to see answer by ikleyn(52832) About Me 

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840