Determine whether the ordered pair is a solution of the linear inequality. y ≤ -2 + 1; (2, 2) PLEASEE HELP, i dont know what to do How do I solve this?

The variable z is directly proportional to x, and inversely proportional to y. when x is 4 and y is 13, z has the value 1.2307692307692. what is the value of z when x= 9, and y= 20

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).

In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq