Lets have some fun: I had $50 dollars My mom gave me $100 dollars Then my dad gave me another $200 My sister chipped in with $75 But my brother gave me $50 My son said, mom I'll give you $150 while my daughter gave me $180 dollars I had another $85 dollars How much did I have???

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5