Given thre points a, b, c, where c is the midpoint of a and b
a. if a = −5 + 2i and c = 3 + 4i, find b.
b. if b = 1 + 11i and c = −5 + 3i, find a.

(a) Point B will be 11+6i

(b) Point B will be 11-5i

Step-by-step explanation:

We have given and

We have given that C is the midpoint of A and B

We know that mid point is given by

So

(b)

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500