(-5a)(-3a ²)
=
15a³
-5 x -3 = 15 ( negative times negative = positive)
a x a² = a³ ( when multiplying exponents, you add the exponents together )
<span>2x + x = 12
=> x =12/3 =4
so, original number is 84.</span>
I believe his net worth would be $21,310
if you add all of it together but subtract his debts that’s your answer i’m pretty sure. hope it helps!
7x+2y=2
steps:
y+21=-7/2x(x-6)
y+21=-7/2x+21
y=-7/2x+21-21
y=-7/2x
7/2x+y=0
2(7/2x+y=0)
7x+2y=2

notice, the distance is the same, upstream or downstream, thus is "d" for both
solve for "r"