Answer:
6.4
Step-by-step explanation:
formula: √(X2-X1)²+(Y2-Y1)²
hope it helps!
I believe it would be A
A deck of cards has 52 cards in it, so it cant be C or D, and with all the possibilities it could not be B
12y-9-(3y-4)-4y+7 =
(9y-5)-4y+7 =
(5y-5)+7=
5y+2