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

36x - 8y²  when 3 and y =-6 

so i guess its like that

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

4+5-7*9/3

first according to pemdas you multiply, so you will have-

4+5-21

now all that's left is addition and subtraction, so go in order, which ever comes first. Next, 4+5 which will give us-

9-21

now just subtract and you get 

-12

A logical solution to why 12+n is the correct answer to the problem is by subsituting a number to the original expression, lets say we subsitute 4, the expression simplifies to 8. Then we can check for all the other 4 answer choices if their expressions simplify to 8. After deductive reasoning, we are able to pinpoint that 12+n does NOT simplify to 8, which is the solution to the problem.

Thanks for the help!

You can easily solve this by using cross multiplication. To do this, multiply each side by the denominator of the fraction from the opposite side of the equation. When that is done you should have this: -4(5-c)=3(2c+2). Now that it is easy to simplify, we use the distributive property to simplify it to -20+4c=6c+6. Then we will have to move the variables to one side, we do this by subtracting 6c from the right side of the equation. Now we have -20-2c=6, then we add 20, which leads to; -2c=26. We then can divide by negative 2 to completely isolate the variable. This gives us the answer as c=-13.

Adding 1/6 to both sides we get 2/3a=1/2. Multiply both sides by 3/2 to get a by itself on one side. By doing this we get a=3/4

We have to get a common denominator in both equations. Let's try to make it positive and the smallest, so it would be 12. Multiplying the left side by 4 would get us (20-4c)/12 and multiplying by -3 on the right side would get us (-6c-6)/12. We can cancel out the denominators by multiply both sides by 1/12 to get 20-4c=-6c-6. Adding 6 to both sides gets us -4c+26=-6c and adding 4c to both sides gets us 26=-2c. Divide by -2 on both sides to get c = -13. Hope this helps!

We can find the unit rate by dividing gallons by price. 70/21 is 3 1/3 and 50/15 is 3 1/3. Both are the same prices so it depends on your personal choice. I would choose the gas that is better for the environment.

Let's start by finding a unit rate. Dividing the price by pounds will give you the price for one pound. If we do 29.85/1.5 we get 19.9 and if we do 20.28/1.2 we get 16.9. 19.9 > 16.9. We always want the better deal, so I would choose the granny apples.

(2/3)a  - 1/6  = 1/3

(2/3)a  =  1/3 + 1/6

(2/3)a  = 2/6 + 1/6

(2/3)a = 3/6

(2/3)a  =  1/2  multiply both sides by 3/2

a  = (3/2) (1/2)   =  3/4

I did not give you the minus but without any explanation your answer has absolutely no value.

Someone else was expressing that when they gave you a minus point.

I believe in you!

i can't it is too hard...but ill try

12+n is different and find the reason why... :p

Justified if because i do it!

I think you mean 2/3a and not 2/(3a)

2/3a = 1/6 + 2/6 

4/6 a = 3/6 

a = 3/6(6/4)

so a= 3/4 

Why this is a trick question? If you want p.m. me !

i said the answer was 1/6 did i get it?

Before nyone answers ill tell you what i got and see if it is correct

I answerd that, but why doesn't it count as me. I just registered

This question has ALREADY been asked today.

So you do not need to ask again!