Solve the systems of linear equations by graphing y=-5/2x-7 x+2y=4 what is the solution to the system of linear equations a. (-4.5,4.25) b. (-1.7,-2.8) c. (0,-7) d. (3,0.5)

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

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?