Urgent answer quickly
giving lots of point.
sean plans to buy a new tablet for $315. the stores offers him an interest-free payment plan that allows him to pay in monthly installments of $25.
explain in words how the amount owed depends on the number of payments made. use n to stand for the number of payments and a for the amount still owed. then write an equation for calculating a for any value of n.

Find the slope of a line given the following two points

Write the equation for the parabola that has x− intercepts (−2,0) and (4,0) and y− intercept (0,4).

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.