Brad wants to open a new savings account. he finds one that returns 3% on his investment each year.
assign a variable to each of the following pieces of information
return rate, r = 3% = 0.03
x = initial investment
b = final balance
after 1 year, the balance i
b = initial investment + interest
b = x + r*x = (1 + r)*x
because r = 0.03,
b = 1.03x (after 1 year)
you must multiply 25 by 4/5.
25/1 times 4/5 = 100/5 = 20
8 and 3/4 of a chore
she needs to earn 13.50-$3=10.50
divide 10.50 by 1.20 to get the amount of chores she needs to do.
the answer is 8 and 3/4 of a chore