Question

I need help with these problems

Answer 1

Explanation:

whenever you see a variable ( a letter ) without a number in front of it, add a 1 ! It means the same thing...

y is the same as 1y

1). 3y + y = ?

Add that 1!

3y + 1y = ?

This problem is the same as 3 + 1

3y + 1y = 4y

2). b + b = ?

Add those 1's !

1b + 1b = ?

this is the same as 1 + 1

1b + 1b = 2b

Remember to keep the variable !

Part B is like a puzzle and the instructions give us hints.

It is telling us, when we see an r, we replace it with the number 3

and when we see t , we replace it with the number 9

Let's solve these puzzles!

8).
`(r)/(t) = ?`

We see and r and a t, let's plug in 3 and 9

Now we have ...

`(3)/(9) = ?`

Divide using a calculator!

We get ....

`(3)/(9) = (1)/(3)` or 0.33

9).
`rt = ?`

When variables are right next to each other, this means they are being MULTIPLIED!

Let's replace r and t with 3 and 9 and multiply them together!

`rt =` 3 × 9

3 × 9 = 27

We do similar things for Part C

12).
`ab = ?`

It tells us a = 5 and b = -4

Let's plug it in

`ab =` 5 × -4

5 × - 4 = -20

USE THESE EXAMPLES AND TIPS TO COMPLETE THE REST OF THE PROBLEMS AND I WILL CHECK THEM FOR YOU.

COMMENT THEM BELOW