Using the Fundamental Counting Principle The keyless entry system in some cars uses a 4-digit keypad. There are 10 possible digits, and the digits can be repeated. How many different combinations are there?

i would say c is the best answer, hope it's right!

good luck! =)

cutie~

1/8 3/16 3/4

step-by-step explanation:

you put them as all the same denominator and multiply

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

7/2

(decimal: 3.5)

welcome ; )

step-by-step explanation: