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janice1989
Hello, I am trying to help my son with his algebra! but i am just having hardest time! can someone please help me?
Hi @janice1989 \[ \begin{array}l\color{red}{\text{W}}\color{orange}{\text{E}}\color{#e6e600}{\text{L}}\color{green}{\text{C}}\color{blue}{\text{O}}\color{purple}{\text{M}}\color{purple}{\text{E}}\color{red}{\text{ }}\color{orange}{\text{t}}\color{#e6e600}{\text{o}}\color{green}{\text{ }}\color{blue}{\text{O}}\color{purple}{\text{P}}\color{purple}{\text{E}}\color{red}{\text{N}}\color{orange}{\text{S}}\color{#e6e600}{\text{T}}\color{green}{\text{U}}\color{blue}{\text{D}}\color{purple}{\text{Y}}\color{purple}{\text{ }}\color{red}{\text{:}}\color{orange}{\text{)}}\color{#e6e600}{\text{}}\end{array} \]
how can we help you ? do you have any specific qustion ?
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!
don't worry, i will try my best to help you :)
you just post the question you have difficulty with.
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?
my name is hartnn, janice :) you can call me that
The expression 5x^2+x-10 has ___ terms and a constand of ____
3,-10 3,10 6,-10 6,10 My son said B
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 ... ?
So the answer would be A than correct?
yes, A would be correct.
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 !
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.
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?
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!
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 ?
Than after we finish this up maybe later on you could help my daughter? And he said 3 :)
so instead he said would it be A than?
Woohoo you are amazing!!!
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
you will find many amazing users here on OpenStudy, willing to help you as much as i am :)
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,....
in 6x^4-3y+5x^4-10 which terms have same exponent of x ?
so would it be A & C
does your boy say/agree with A and C too ?
Yeah he said that, i am just typing for him because he is little bit slow on typing! :D
tell him he is absolutely correct :)
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!
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?
He said would it be B? since 7+2 = 9??
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
He said hes heard of it, but isnt really sure what it is.
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 ?
he said oh that is what exponent is i know now! lol. Thank you, hes working on the next one :)
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?
why B , how did he get co-efficients like 2,-7 and 12 ?
He says he dont know, i think he was guessing. He does that a lot. Im sorry!
(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 ?
he said for like terms would it be 5x^2 -3x -3x^2 and 4x?
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 ?
note x means x^1 , both mean the same
he said he is confused. he said he dont get that,
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?
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 = ... ?
he said uh he thinks you can combine them not 100% sure
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
he understands whats next step?
so, finally, putting the results together, 2x^2-x+12
distribute and simplify 7(2x-4)+2(3x+1) 20x+26 20x-26 14x-28 6x+2 He asked what is it to distribute???
Distribution Property : a(b+c) = ab+ac |dw:1379629904908:dw| ask if you need an explanation in words....
ok he said he got it so far
|dw:1379630067115:dw| so can he fill that now ?
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
14 &-28correct he said?
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)
good! and whats 2*3x = ... ?
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.
2x, 3x?? and 14x and 6x?
from this 14x-28+6x+2 there are only 2 terms containing 'x' , right ? so what is 14x+6x =....?
the constants, -28+2 =... ? and so the final answer will be ?
-26 that look like a - instead of a +
-28+2 = - (28-2) = - (26) yes.
there is 2 more questions could you help out with?
yes, go ahead with them, lets crack them together! :)
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??
yes, he is correct! congratulate him on my behalf :)
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?
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! :) :)
Woohoo Thank you sooo soo much Hartnn!! :) You are amaizng! you did such a great job! :D You are beyond smart!! :D
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 :)
Janice, glad Hartn could help your son. Do come back and help OpenStudy grow by spreading the word to other parents and friends. Thanks.