+142 A student was supposed to substitute a certain value for x into the expression 2x^3. The student thought the expression was (2x)^3. If the student's answer was 384 greater then the correct answer, what value of x did the student use?
I hope this is the question!
So basically, I need help with the fact that you have a confusing equation...
I DONT EVEN GET THE QUESTION
HELP
+2864 How do you know?
Wow, you are 6 feet already, you sure are healthy!
+2864 Never mind, you said "sis"
That must mean that Magic Kitten is your sister!
+1713 She's my 13-year-old sister who is SIX FREAKING FEET..
I'm 11 and 5'7...
My family is usually taller than average....
+2864 Wow.... you are TALL
I am 5'7'' too!
Except I am in 8th grade lol
+2864 wow you guys all skipped grades.
Its so hard to skip grades in my area!
The only person EVER to skip a grade was a math prodigy who ACED the ACT in 5th grade, and also scores a NEARLY PERFECT on the AMC 8.
Also they do super good in mathcounts, placing top 20 in state.
+312 Ok, so this nimrod of a student was supposed to calculate 2 times x cubed. Instead, he computed 2x cubed. (2x)3 = 8x3
Now, we know that 2x^3 is 384 greater than the correct answer which is 8x^3.
8x^3 + 384 = 2x^3
-6x^3 = 384
x^3 = -64
x = -4
+142 I think that nimrod of a student could have been my brother...
Ahem Ahem
+2864 What the question means is that:
when the student substituted a number for \(x\) in \((2x)^3\), the result was \(384\) larger than substituting for \(2x^3\).
So find X.
\(2x^3+384=(2x)^3\)
\(2x^3+384=8x^3\)
\(6x^3=384\)
\(x^3=64\)
\(x=4\)
The answer should be 4.
+312 By the way, I feel violated for how tall you guys are. At least I got taller than last year's pathetic 4'8". I'm 5'2" and in 7th grade.
+1713 Deleted
+1713 My sisters Stole my laptop-
ran with it
somhow typed that
ran back
gave it back
and now
oof
+2864 for some reason I feel like you guys are a super hero family from the Incredibles.
except your sister has super speed
and maybe you have some super brains.
+1713 My sister is more of an athletic girl but is like really smart.
I'm the super nerd- shes the popular outgoing nerd.
Her favorite game is Torment her younger Brother with the help of my younger sister.
+142 I'm smarter then my idiot brother!!!
:<
And im like a popular nerd???? #mybrosaidthis
I don't know..
I take Jujitsu...
+2864 the thing is, \(\frac{1}{3}\) of my school is nerds.
Literally, everybody has like an IQ over \(9000\)
Everybody goes tryhard, and its so hard to be at the top.
I dream of going to this school, called IMSA.
Its one of the top ten highschools in the nation!
You have to apply, and it is SUPER competitive.
The academics there, are, HARD.
you are REQUIRED to take AMC 10, its like part of the curricilum. The math classes are competition based. meaning, everyday, you day mathounts type math.
+142 I go to an all-girls private school.
ScHOlaRsHiP!!!
The food is great...
Lol
