Question

good morning everyone!!!!! can someone please help me with Algebraic Expressions I think i know how but there a variables throwing me off course... Thank you

Answer 1

this is the first exspression im caught on http://static.k12.com/bank_packages/files/media/mathml_3ad92e4b86aec91607782447dc174d5c7d8ad588_1.gif

Answer 2

what should i hv to do

Answer 3

i just need someone to explain how i would use the variable x in the answer... i don't understand the problem

Answer 4

@jojo4eva

Answer 5

@Vivid

Answer 6

@Legends

Answer 7

We cannot subtract a constant from a variable. So, you will have to leave the answer in terms of 'x'; but remaining expression has to be simplified to lowest possible form.

Answer 8

ok i unsterstand the first part... but what do you mean by the second?

Answer 9

@A_clan

Answer 10

@k12andstudyislandhelp

Answer 11

Have you heard of BODMAS rule?

Answer 12

no i havent... what is it? @A_clan

Answer 13

B → Brackets first (parentheses)

O → Of (orders i.e. Powers and Square Roots, Cube Roots, etc.)

DM → Division and Multiplication (start from left to right)

AS → Addition and Subtraction (start from left to right)

Note:

(i) Start Divide/Multiply from left side to right side since they perform equally.

(ii) Start Add/Subtract from left side to right side since they perform equally.
( I searched it on GOOGLE.)

Answer 14

oh ok thank you... so i figured out the the parentheses which was easy but now i dont know wht to do with the 2x!

Answer 15

@A_clan

Answer 16

This is the priority rule. Whenever you encounter a mathematical expression containing one or more of mathematical operations BODMAS, then start solving the brackets first , followed by 'Off' , then DM and finally AS. Within the 'Brackets' also start by solving bar bracket first, followed by small brackets, then parentheses and finally square brackets.

Answer 17

In the given question, we shall start by solving the small brackets.
(0.5- 1.4)
=(-0.9)

Answer 18

then you subtract that with 2x

Answer 19

but i thought i couldnt do that because of the variable?

Answer 20

Next step is the square bracket.
[2x- (-0.9)]
= [2x+0.9]

Answer 21

ahh i would have never thought to do that lol

Answer 22

then after you do this you multiply that by 4.5

Answer 23

13.05?

Answer 24

Then in last step multiply this square bracket.
-4.5[2x+0.9]
=-4.5 * 2x + -4.5*0.9
=-9x - 4.05

Answer 25

This is the most simplified form. and hence the required answer.

Answer 26

thank you!!!! i think i get it now!!!

Answer 27

you're welcome.