Twice the sum of 13 and x is not greater than 15

x = 0

Step-by-step explanation:

This is saying that 2(13x) < 15

If you have 2[13(0)] < 15

It will come to 2(0) < 15

This equals 0 < 15 which is true therefore making the x value = 0

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.  

for every positive x value, the y value must be greater than 1.

for every negative x value, the y value must be less than 1.

in your options, you can check to see that one of these two criteria is met. if neither are met, then it is not on a slope with positive line.