anonymous
  • anonymous
Hello, I am trying to help my son with his algebra! but i am just having hardest time! can someone please help me?
Mathematics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
hartnn
  • hartnn
Hi @janice1989 \[ \begin{array}l\color{red}{\text{W}}\color{orange}{\text{E}}\color{#e6e600}{\text{L}}\color{green}{\text{C}}\color{blue}{\text{O}}\color{purple}{\text{M}}\color{purple}{\text{E}}\color{red}{\text{ }}\color{orange}{\text{t}}\color{#e6e600}{\text{o}}\color{green}{\text{ }}\color{blue}{\text{O}}\color{purple}{\text{P}}\color{purple}{\text{E}}\color{red}{\text{N}}\color{orange}{\text{S}}\color{#e6e600}{\text{T}}\color{green}{\text{U}}\color{blue}{\text{D}}\color{purple}{\text{Y}}\color{purple}{\text{ }}\color{red}{\text{:}}\color{orange}{\text{)}}\color{#e6e600}{\text{}}\end{array} \]
hartnn
  • hartnn
how can we help you ? do you have any specific qustion ?
anonymous
  • anonymous
Yes can you give me a min? I am not sure how to really work this nad help my son, he has special needs! so he has hard time understanding it and im just stuck! and the teachers dont help at all! im just os stressed out!

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hartnn
  • hartnn
don't worry, i will try my best to help you :)
hartnn
  • hartnn
you just post the question you have difficulty with.
anonymous
  • anonymous
Okay, Sorry it took so long to reply he got one asnwer right hold on whille i type the ones we need help with! What is your name?
hartnn
  • hartnn
my name is hartnn, janice :) you can call me that
anonymous
  • anonymous
Okay!
anonymous
  • anonymous
The expression 5x^2+x-10 has ___ terms and a constand of ____
anonymous
  • anonymous
Oh i forgot answers
anonymous
  • anonymous
3,-10 3,10 6,-10 6,10 My son said B
hartnn
  • hartnn
3 terms are correct! 5x^2 -> one term +x ->2nd term -10 -> 3rd term but the constant is the term with no ''x" in it, which is ... ?
anonymous
  • anonymous
-10 he said
hartnn
  • hartnn
and he is correct! :)
anonymous
  • anonymous
So the answer would be A than correct?
hartnn
  • hartnn
yes, A would be correct.
anonymous
  • anonymous
He is smiling ear to ear he got it right! you can explain it a lot better than i could, there is some more if you dont mind helping with !
hartnn
  • hartnn
i don't mind, at all :)
anonymous
  • anonymous
Janice, thanks for using OpenStudy. Do tell other parents about us. Hartnn is one of our senior, most skilled and patient OpenStudiers! There are many like him on the site to help. They do it because they love Math and helping young learners.
anonymous
  • anonymous
the expression 9x^2-5x-7 has __ terms and a constant of ___ 3,-7 5,-7 3,7 -5,7 He said there is 5 terms and a constant of -7 since its right after the x. so he said it would be B correct?
Preetha
  • Preetha
Good work Hartnn!
anonymous
  • anonymous
I will for sure tell other parents about it! Ive been stuck on this for such a long time, And someone told me about it, this is an amazing website, Do you also do Geometry?? My daughter is doing geometry and also has special needs she has Aspergers and is having such a hard time with it.. and she is just stressed and all!
hartnn
  • hartnn
thank you for the appreciations, yes, i do geometry too :) lets count the terms in , 9x^2-5x-7 9x^2 -5x -7 how many ?
anonymous
  • anonymous
Than after we finish this up maybe later on you could help my daughter? And he said 3 :)
anonymous
  • anonymous
so instead he said would it be A than?
hartnn
  • hartnn
A is correct :)
anonymous
  • anonymous
Woohoo you are amazing!!!
anonymous
  • anonymous
In 6x^4-3y+5x^4-10 what are the like terms in the expression choose all that apply.. 6x^4 -3y 5x^4 -10 he said all of them
hartnn
  • hartnn
you will find many amazing users here on OpenStudy, willing to help you as much as i am :)
hartnn
  • hartnn
like terms are those which have same exponent of 'x' like x^3, -3x^3, 8x^3 .... (one set of like terms) x,4x,9x,-x,.... and constants like 4,8,0,-1,....
hartnn
  • hartnn
in 6x^4-3y+5x^4-10 which terms have same exponent of x ?
anonymous
  • anonymous
so would it be A & C
hartnn
  • hartnn
does your boy say/agree with A and C too ?
anonymous
  • anonymous
Yeah he said that, i am just typing for him because he is little bit slow on typing! :D
hartnn
  • hartnn
tell him he is absolutely correct :)
anonymous
  • anonymous
Okay :D hold on he is working on next one to see if he can get it, who would have known a stranger online could help so much more than a teacher!
hartnn
  • hartnn
now you know :)
anonymous
  • anonymous
Simplify : 7x^2+2x^2 7x^2 9x^2 14x^4 9x^4 He said he is not sure what to do can you explain it step by step? He said it would either be A or B since the top number are both 2. or do you add them together?
anonymous
  • anonymous
He said would it be B? since 7+2 = 9??
hartnn
  • hartnn
the top number (here 2) is called the exponent. does he know what an exponent is ? and yes, B is correct, because 7x^2+2x^2 = (7+2)x^2 = 9x^2
anonymous
  • anonymous
He said hes heard of it, but isnt really sure what it is.
hartnn
  • hartnn
i'll explain, x^n, x is called the 'base' and n is called the exponent. x^n implies , multiplying 'x' to itself, 'n' times. we take an example : 2^4 will imply multiplying 2 4 times = 2*2*2*2 = 16 similarly, x^2 will imply multiplying x with itself twice, x*x got this ?
anonymous
  • anonymous
he said oh that is what exponent is i know now! lol. Thank you, hes working on the next one :)
anonymous
  • anonymous
Subtract the second expression from the first (5x^2-3x+5)-(3x^2-4x-7) 2x^2+x+12 2x^2-7x+12 8x^2+x+12 2x^2+x-2 He said would it be B?
hartnn
  • hartnn
why B , how did he get co-efficients like 2,-7 and 12 ?
anonymous
  • anonymous
He says he dont know, i think he was guessing. He does that a lot. Im sorry!
hartnn
  • hartnn
(5x^2-3x+5)-(3x^2-4x-7) = 5x^2 -3x +5 -3x^2 - (-4x) - (-7) {by distributing the negative} = 5x^2 -3x +5 -3x^2 +4x +7 {because negative times negative becomes positive!} then we identify like terms. but is this much clear ?
anonymous
  • anonymous
he said for like terms would it be 5x^2 -3x -3x^2 and 4x?
hartnn
  • hartnn
for like terms , the exponent of x should be same, for which terms exponent of x is 2 ? for which terms exponent of x is 1 ?
hartnn
  • hartnn
note x means x^1 , both mean the same
anonymous
  • anonymous
he said he is confused. he said he dont get that,
hartnn
  • hartnn
ok, the 5x^2 and -3x^2 has exponent of 2 so these are like terms and we can combine them in this way, 5x^2-3x^2 = (5-3)x^2 = 2x^2 got this?
anonymous
  • anonymous
got it he said
hartnn
  • hartnn
cool, from this : 5x^2 -3x +5 -3x^2 +4x +7 the other like terms are -3x and +4x (because they both contains just x with it, not x^2 or x^3 .....) so we can combine them like : -3x+4x = (-3+4) x = ... ?
anonymous
  • anonymous
he said uh he thinks you can combine them not 100% sure
hartnn
  • hartnn
yes, they can be combined because they both have same exponent (=1 here) so, -3x+4x = (-3+4) x = -x lastly, what remains are just constants, 7+5 , which =12
anonymous
  • anonymous
ok he got this,
anonymous
  • anonymous
he understands whats next step?
hartnn
  • hartnn
so, finally, putting the results together, 2x^2-x+12
anonymous
  • anonymous
ok got it
anonymous
  • anonymous
distribute and simplify 7(2x-4)+2(3x+1) 20x+26 20x-26 14x-28 6x+2 He asked what is it to distribute???
hartnn
  • hartnn
Distribution Property : a(b+c) = ab+ac |dw:1379629904908:dw| ask if you need an explanation in words....
anonymous
  • anonymous
ok he said he got it so far
hartnn
  • hartnn
|dw:1379630067115:dw| so can he fill that now ?
anonymous
  • anonymous
7 2x + 7-2
hartnn
  • hartnn
the operation is actually of multiplication while distributing, a(b+c) = a*b + a*c so, that will be = 7*(2x) + 7*(-4) got this ? and simplify this further
hartnn
  • hartnn
like 7*(-4) = -28,
anonymous
  • anonymous
14 &-28correct he said?
hartnn
  • hartnn
yeah, just don't forget the 'x' too 7*2x = 14x 7*(-4)=-28 so, the first part 7(2x-4) = 14x-28 in same way, please try the second part, 2(3x+1)
anonymous
  • anonymous
2*(3x) + 2(1)
hartnn
  • hartnn
good! and whats 2*3x = ... ?
anonymous
  • anonymous
6 dalton said
hartnn
  • hartnn
2*3x = 6x (again, don't forget the 'x') so we have 7(2x-4) +2(3x+1) = 14x-28+6x+2 we have distributed successfully, now time to combine like terms, tell him to try first.
anonymous
  • anonymous
2x, 3x?? and 14x and 6x?
hartnn
  • hartnn
from this 14x-28+6x+2 there are only 2 terms containing 'x' , right ? so what is 14x+6x =....?
anonymous
  • anonymous
yes. 20x
hartnn
  • hartnn
the constants, -28+2 =... ? and so the final answer will be ?
anonymous
  • anonymous
-30
hartnn
  • hartnn
-28+2 is not -30
anonymous
  • anonymous
-26 that look like a - instead of a +
hartnn
  • hartnn
-28+2 = - (28-2) = - (26) yes.
anonymous
  • anonymous
there is 2 more questions could you help out with?
hartnn
  • hartnn
yes, go ahead with them, lets crack them together! :)
anonymous
  • anonymous
evaluate the expression 2(x+y) ---------- for x=6 and y=7 3 13/3 19/3 20/3 26/3 he said its look like this 2(6+7) ------- 3 he said would the answer be 26/3??
hartnn
  • hartnn
yes, he is correct! congratulate him on my behalf :)
anonymous
  • anonymous
Evaluate the expression 3x+4y --------- x=1.5 and y=2.5 2 2 4.25 6.25 7.25 His work 3(1.5) +4(2.5) -------------- 2 would it be 7.25?
hartnn
  • hartnn
lets check, 3(1.5) + 4(2.5) = 4.5+10 = 14.5 is the numerator. and 14.5/2 = 7.25 is the correct answer! :) :)
anonymous
  • anonymous
Woohoo Thank you sooo soo much Hartnn!! :) You are amaizng! you did such a great job! :D You are beyond smart!! :D
hartnn
  • hartnn
you are welcome janice :) even i am glad that i could help you. and i want to request your son to practice more problems. with good amount of practice, your son can be smarter than me :)
Preetha
  • Preetha
Janice, glad Hartn could help your son. Do come back and help OpenStudy grow by spreading the word to other parents and friends. Thanks.

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