The expression for the balance (b) in terms of the number of years (t) can be written as
... b = 2000·2^(t/19) . . . . . . the amount grows exponentially, and is is doubled when t=19
Then for t=5, the balance is
... b = 2000·2^(5/19) ≈ 2400
The best choice is ...
... A. $2400
Answer:
a=-1.2
Step-by-step explanation:
5x-10=3x+a=12
let's first find x:
5x-10=12
add 10 to both sides:
5x=22
divide both sides by 5:
x=4.4
now that we know what x is, we can plug it back into the equation to find a:
3*4.4+a=12
first, simplify both sides:
13.2+a=12
then, subtract 13.2 from both sides:
and our answer is: a=-1.2
Answer:
Step-by-step explanation:Subtract the x to the opposite than division
Maria saved 3/7 of her money.
7/7 (which is one) - 4/7 = 3/7
Here, you just need to take 10 2/3 and divide it by 11/20. You can just stick this into a calculator, or you can do it by hand. If you want to do it by hand the first step is to make 10 2/3 an improper fraction. It'll now be 32/3. Then you'd do 32/3 divided by 11/20. Of course, to do this though you'll have to make the division sign a multiplication sign, and flip the other fraction, so it is its reciprical.
It'll now look like this: 32/3 x 20/11
Then you just multiple straight across and get 640/33.
Simplify and you get 19 and a long decimal.
So, your answer is 19, since you can't have a fraction of a CD.
