Question

How do you write:
42 decreased by twice a number
in algebraic expression WILL REWARD MEDAL

Answer 1

42 - 2x (in x)

Answer 2

please explain

Answer 3

why isn't it 2x-42?

Answer 4

that's just a translater from words to expression algebraic

Answer 5

oh. what if it says...
the sum of the cube of a number and 12.... is it n^3 +12?

Answer 6

if it says :
42 decreased "from" twice a number, yeah it is 2x - 4

the sum of the cube of a number and 12, yeah you are right it is n^3 + 12

Answer 7

* 2x - 42 i mean

Answer 8

oh. thank you very much.

Answer 9

you're welcome

Answer 10

also, i have one more problem

Answer 11

name the property used in each equation. then find the value of n.

7y+y=7y+ny

Answer 12

im not sure is the answer " reflexive or symmetric property" im forget this, sorry :)

Answer 13

@rizwan_uet , you know this ?

Answer 14

oh.at least you told me one of the,. thanks. i thought it was commutitive.. LOL. uhm... what is n?

Answer 15

isnt it obeys distributive property??? @RadEn

Answer 16

a+b = b+a (it is commutative)
a(b+c) = ab + ac (it is distributive property)

Answer 17

so is it reflexive, since symmetry it has to be 7y+y=ny+7y, but it's not... so is it reflexive?

Answer 18

if we take y common on both sides we get
y(7+1) =y (7+n)
now using distributive property on each side we get
7y+y=7y+ny

Answer 19

i don't get it....

Answer 20

me too, haha...

Answer 21

you have this equation
7y+y=7y+ny
now some property of real number was applied to a certain equation to get
7y+y=7y+ny

my guess was that the equation was in this form
y(7+1) =y (7+n)

now applying distributive property in both sides we get
7y+y=7y+ny

sorry for my weak english LOL

Answer 22

lol. it wasn't weak. :P
...but then what is n? because you have to find the value of that.... is it 1? or not... idunno

Answer 23

7y+y=7y+ny
the only value that n can hold is 1 to get both sides similer of the above equation

Answer 24

so i'm right?
it's distributive and 1?

Answer 25

for the value of n you are absolutly right but for distributive property it was my state of arguments

Answer 26

oh. okay...
can you also do another problem...let's say(random):
(6+n)x+15x

Answer 27

(6+n)x+15x
using multiplicative property property we get
x(6+n)+15
now using distributive property
6x+nx +15x

Answer 28

why did you add 15 x to the equation?

Answer 29

its the part of equation

Answer 30

then where's the equal sign?

Answer 31

hmm wait

Answer 32

okay

Answer 33

(6+n)x+15x
using multiplicative property property we get
= x(6+n)+15x
now using distributive property
= 6x+nx +15x

Answer 34

does this make sense now??

Answer 35

yes, so it is distributive property, and the n is 9, right?

Answer 36

basically you wrote this at first
(6+n)x+15x
now its not an equation until you mention some equality sign here
now you cant find n in the absence of equality sign

Answer 37

sorry i lost internet connection

Answer 38

it's alright, and thank you!

Answer 39

welcome