+0

# Math

+1
139
8

Hi everyone

Is there someone who can maybe assist me with this question.

What is the value of 36x - 8ywhen 3 and y = -6

I looked the answer up , but still dont understand how to get to the answer eventhough I tried to follow the steps that was given with the answer.

Hope someone can  assist me . would be much appriciated...

Oct 14, 2018

#1
+769
+1

Do you mean when 3=x and y=-6?

Oct 14, 2018
#2
0

there is no = next to the 3 all it says is

36x - 8y2  when 3 and y =-6

so i guess its like that

Guest Oct 14, 2018
#3
+769
-1

36x- 8y² = 36·3 - 8·(-6)²
= 108 - 8·36
= -180

I hope that helped

SmartMathMan  Oct 14, 2018
#4
+1

36x- 8y² = 36·3 - 8·(-6)²
= 108 - 8·36
= -180

How did you work it out though

Do you take 108 - 8 x 36 ? sorry I'm just trying to figure out how you get the answer so i can understand it better

Guest Oct 14, 2018
#5
+194
+1

First thing you do is input 3 into x(if 3 is x the question doesnt make sense) and -6 into y

36x - 8y^2

36(3)-8(-6)^2

108-8(36)

108-288

the answer would then = -108

Baneofwizard  Oct 14, 2018
#6
+445
+1

OK let's get started!

36x - 8y2    Where 3= x and y= -6.

36x- 8y² = 36·3 - 8·(-6)²
= 108 - 8·36 } Here you multiply 8*36 before you subtract according to PEMDAS.

= 108 - 288

= -180

Hope this clears things up! Don't hesitate to ask more questions here on the forum!

Oct 14, 2018
edited by Mr.Owl  Oct 14, 2018
edited by Mr.Owl  Oct 14, 2018
#7
+769
-1

Mr. Owl is wrong. Three people got the same answer but he got a random answer. Only answer if you know you have done the problem correctly.

Oct 14, 2018
#8
0

But he got the same answer as you... and only 3 users answered this question...

Guest Oct 14, 2018