Need your help please i want to pass the 7th grade
if i get this right i will be in 8th if i dont i will stay back

the top three are correct and also the bottom

Step-by-step explanation:

i used my brain.

-30 x 4; -(4 x 30); -120

Step-by-step explanation:

Each year, it decreases by $30, which can be represented with -30.

So the base expression to represent the change would be:

-30 x 4

The negative sign can also be factored out to find the equivalent expression of:

-(4 x 30)

The last thing that you can do is multiply the values together to get the total of all 4 years. This generates the expression of:

-120

These are the three expressions that represent the total change after 4 years.

if you are looking for the unit rate then the answer would be 9 because unit rate is distance divided by time.

step-by-step explanation: