A locker combination has 2 nonzero digits. Digits in a combination are not repeated and range from 2 through 9. Event A = choosing an odd digit for the first number Event B = choosing an odd digit for the second number If all of the digits are equally likely to be chosen, what is P(B|A) expressed in simplest form?.

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Nine more than four times a number is the same as one less than twice the number. find the number?

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)