A landscaper uses paving stones for a walkway. Which are possible angle measures for a and b so that the stones do not have space between them A 50,100 degrees
B 45 , 45 degrees
C 75, 105 degrees
D 90 , 80 degrees

Which system of linear inequalities is graphed? can somebody please

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)

Astudent draws two parabolas both parabolas cross the x axis at (-4,0) and (6,0) the y intercept of the first parabolas is (0,-12). the y intercept of the second parabola is (0,-24) what is the positive difference between the a values for the two functions that describe the parabolas