Find 3x − y − 3z if x = −2, y = 1, and z = −2.
A. -13
B. -1
C. 1
D. 13
I am stuck between A and B
show me your work. I will check it.
okay. This is what I have for you.
3*-2-1-3(-2)
And I got -13. Is that correct??
I am going to assume that this is correct just cause that's the answer that I got and no on is willing to check my answer so I am going for it. Bobpursley, you said that you would check my answer when I thought that I had the correct answer and now here I am assuming that its right because you wont check it for me.
No, it is not - 13.
Well thanks for telling me now that I have already sent it in and got the question wrong when I could have had the question right. Next time speed things up on answering the students when they go and post a question with their answers.
Speed it up??
You are told on the Post a New Question page to have patience, that tutors here are VOLUNTEERS -- who don't have to show up at all!
A time-out for a couple of days might help you think this through, and read EVERYTHING on this webpage:
http://www.jiskha.com/post_form.cgi
Summer -- if you wait to the last minute to post questions here, you may be wasting your time. If you don't like the way Jiskha does things, you don't have to post here.
To find the value of 3x - y - 3z, we can substitute the given values of x, y, and z into the expression.
Given:
x = -2
y = 1
z = -2
Substitute these values into the expression:
3x - y - 3z = 3(-2) - 1 - 3(-2)
Simplify the expression:
= -6 - 1 + 6
= -7 + 6
= -1
Therefore, the value of 3x - y - 3z when x = -2, y = 1, and z = -2 is -1.
So, the answer is option B.