If you go out to eat with 3 friends and your meal was $72.50, there is 7.5% sales tax and you should tip the waiter 15%. how much should each person pay? (tip should be based on the cost of the food without tax included.)

Each person should pay 22.21

Step-by-step explanation:

To find the amount that you should spend, multiply the tip and tax amounts by the cost of the meal.

72.50 * 7.5% = 5.44

72.50 * 15% = 10.88

Now we add the cost of dinner to those two amounts.

72.50 + 5.44 + 10.88 = 88.82

And to find the cost for each person, divide the whole thing by 4.

88.82/4 = 22.21

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

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step-by-step explanation: