If 20 pounds of fertilizer will cover 1500 square feet of lawn, how many pounds are needed for 2500 square feet

Apple pie is removed from 350 degree oven. temperature of the pie t minutes after being removed id given by the function t(t)=72+268e-0.068t

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?