6. Quadrilateral ABCD has vertices at A(0,6), B(4,-1), C(-4,0) and D(-8, 7). Prove that: (a) ABCD is a rhombus using the distance formula
(b) The diagonals of ABCD are perpendicular​

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

4+4+2x

or

2x+8

step-by-step explanation: