You work for 6.5 hours at a rate of $11.50 / hour.

you buy dinner that costs $12, and give a 20% tip.

how much money are you left with?

Step-by-step explanation:

step 1

Find the total amount of money worked

Multiply 6.5 hours by the rate $11.50 / hour.

step 2

Find the total cost of the dinner

Remember that

so

the cost of the dinner plus the tip is equal to

step 3

Find the amount of money left

Subtract the total cost from the total amount of money

so

a4 - 3a2 - 1

step-by-step explanation:

step   1   :

equation at the end of step   1   :

  ((a4) -   3a2) -   1

step   2   :

trying to factor by splitting the middle term

2.1     factoring   a4-3a2-1  

the first term is,   a4   its coefficient is   1 .

the middle term is,   -3a2   its coefficient is   -3 .

the last term, "the constant", is   -1