Ineed to know the measures of all the angles in the figure

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20

Jared had 3/7 of the minutes on a family phone plan remaining for the month. the plan is shared by 2 people. if divided equally what portion of the minutes remaining on the phone plan would be avalible for each person