Question

A) Look at this expression.

4a + 5 + 4a
Select the expression below that shows it written as simply as possible.
8(a + 5)
A
13a
B.
5
С
8a + 5
D
20a
E
b) Look at this other expression. 2c + 6 + 3c-4
Simplify this expression as much as possible.

Answer 1

A) The answer is D, 8a + 5

4a + 5 + 4a

we simplify this expression(combine like terms):

group them first;

(4a + 4a) + 5

8a + 5

B) 2c + 6 + 3c - 4

simplify this expression (combine like terms):

group them first;

(2c + 3c) + (6 - 4)

5c + 2

Answer 2

1.
`8a+5`
2.
`5c+2`

Explanation:

Given the following questions:


`4a+5+4a`

`2c+6+3c-4`

In order to simplify the two expressions, we have to group the terms that have similar variables, and then combine those terms by adding/subtracting the numbers that have the similar variables.

Number one:

`4a+5+4a`

`4a+4a+5`

`4a+4a=8a`

`8a+5`

Number two:

`2c+6+3c-4`

`2c+3c+6-4`

`2c+3c=5c`

`5c+6-4`

`6-4=2`

`5c+2`

Hope this helps.