How many 7-digit telephone numbers can be formed if the first digit cannot be 0 or 1

8,000,000 combinations

Step-by-step explanation:

Since we have 10 digits per slot, we need to remove two digits, 0 and 1, for the first slot therefore we get:

8 × 10 × 10 × 10 × 10 × 10 × 10 =

8,000,000 combinations

step-by-step explanation:

yes it represnts a functio, their are not 2 of the same numbers on the both sides

the solution, from the graphing of the two lines, is (3,2), i.e., x = 3, y = 2.