Determine how many cards, in an ordinary deck of fifty-two, fit the description.
face cards and hearts

12 face cards ; 13 spade cards ; 25 cards total
Face cards - Jack, Queen, King
4 suits so 4 (suits) x 3 (faces) = 12 cards for face
52 (cards total) divided by 4 (suits) = 13
Spades - 13

Multiply 9 and 67. then multiply 3 with 67. lastly the answer that you got for 9x67 is to be subtracted by the answer you got for 3x67

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.