A house alarm code is in the form AABC. Digits A must be 2, 4, or 9. Digit B can be any digit. Digit C cannot be a 0. How many different four-digit alarm codes can be formed for a house alarm?

21.4 i did it already for s1

step-by-step explanation:

5+2x=a

asdasdsaadsaddsasds

"image"

step-by-step explanation:

in most of these problems, the notation is that the point with a "prime" is the image of the point without. that is, b' is the image of b.

here, there is no dilation or reflection. there is simply translation (with no direction shown). which figure you call the "preimage" and which one you call the "image" is up to you. as a matter of convention, the naming is as described above.