Which description represents the expression 3x + 4 ?

the sum of 3 times a number and 4

4 added to 3 plus a number

4 divided by the product of 3 and a number

4 less than 3 times a number

first option

Step-by-step explanation:

To know this, let's begin with discarting options.

The expression is 3x + 4

This expression means that you have 3 times a number and then you add 4 to that number.

According to this, the second option states that to the number 4 you add the 3, in other words 4 + 3 and then a number. This cannot be the correct option.

The third option states a division, but we don't have in the expression any division, so, this is not the option.

The fourth option is the same as the second option with the difference that instead of adding you do a substract, which is not the case.

So with this we can conclude that the correct option is the first one, sum 3 times a number with 4.

on friday there were 15 birds

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation: