To find the variable x, set the two outside equations equal to each other because all sides are equal
x+13=3x+3
13=2x+3
10=2x
x=5
then to find h, you set the equation equal to 90 because that's how many degrees it is
2h-45=90
2h=135
h=67.5
we can use synthetic division
and then we can find quotient
we can see in the image
we will get
so, we get
.............Answer
Answer:
8.25% is the interest rate on this account
9.80 / 20 = 0.49. Justin payed $0.49 per pound. :P