hey Guys I have a DBA and I need help on just one small thing I dont understand before I call my teacher, 2x - y -3w x=4 y=5 w=-6. I would Also like to know whats the name of the algebra operation. Thank you.

Question

hey Guys I have a DBA and I need help on just one small thing I dont understand before I call my teacher, 2x - y -3w     x=4  y=5 w=-6. I would Also like to know whats the name of the algebra operation. Thank you.

teddyiswatshecallsme · Answer

What are you solving for? what are the instructions?

directrix · Answer

I don't understand what the task is.

Is it to evaluate the expression ( 2x - y -3w ) for x=4 y=5 w=-6 by substitution.

directrix · Answer

Substitution may be the word of what you are thinking.

just_one_last_goodbye · Answer

Yes @Directrix thats its evaluate

teddyiswatshecallsme · Answer

Okay...

just_one_last_goodbye · Answer

I failed my first attempt on the DBA cause i got this one wrong I would like to know how to solve it ^_^

texaschic101 · Answer

2x - y - 3w
2(4) - (5) - 3(-6)

so whats 2 * 4 =

just_one_last_goodbye · Answer

8

anonymous · Answer

FVLS?

texaschic101 · Answer

8 ...then we have -5.....now whats 3 * -6

just_one_last_goodbye · Answer

Connexus academy but same thing just different names

just_one_last_goodbye · Answer

@texaschic101 so if the number is by its self its automatically a negative 5?

anonymous · Answer

$$Cool :)$$

just_one_last_goodbye · Answer

im guessing 3* -6= -18

texaschic101 · Answer

2(4) - (5) - 3(-6) =
8 - 5 - (-18) --- a negative times a negative is a positive
8 - 5 + 18 ....now just finish with the simple arithmetic and what do you get ?

texaschic101 · Answer

can you finish ?

just_one_last_goodbye · Answer

so since subtraction comes first its... 8-5 = 3 and 3 + 18=21

texaschic101 · Answer

correct....answer is 21

just_one_last_goodbye · Answer

hmm I feel stupid now xD seems so easy

texaschic101 · Answer

don't feel stupid...you probably had trouble with the signs....just do it enough and all this will come natural to you

just_one_last_goodbye · Answer

thanks @texaschic101 oh btw idk if u remember me but im UsArmy3947

texaschic101 · Answer

thats you....cool....good to see you again :)

just_one_last_goodbye · Answer

nice to see you 2 ^_^

just_one_last_goodbye · Answer

omg im so happy now thanks so much @texaschic101 cant wait till my teacher calls back

texaschic101 · Answer

tell you you know exactly what your doing and can ace any test given...lol

just_one_last_goodbye · Answer

@texaschic101 do you know whats the name of this operation or no?