17.27. How many Social Security numbers (see Exercise 8.12) have their nine digits in strictly increasing order

"10 possibilities" is the appropriate response.

Step-by-step explanation:

The numbers will be:

⇒

Now anyway we commence with right and afterwards remove nine from eight and seeing as maintain the sequence growing.

then,

Thus, the above is the correct answer.

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

the function makes a strait line horizontally with no x intercept but a y intercept at 9.