Answer:
9%
Step-by-step explanation:
You are going to want to use a modified compound interest formula, as shown below. This version of the compound interest formula is what you use to solve for the interest rate.
![r = n[(\frac{A}{P})^{1/nt}-1]](https://tex.z-dn.net/?f=r%20%3D%20n%5B%28%5Cfrac%7BA%7D%7BP%7D%29%5E%7B1%2Fnt%7D-1%5D)
<em>r = interest rate (decimal)</em>
<em>n = numbers of times compounded (annually)</em>
<em>A = total amount</em>
<em>P = principal amount</em>
<em>t = time (years)</em>
Now, lets plug in the values:
![r = 3[(\frac{1,780.74}{1,046})^{1/(3)6}-1]](https://tex.z-dn.net/?f=r%20%3D%203%5B%28%5Cfrac%7B1%2C780.74%7D%7B1%2C046%7D%29%5E%7B1%2F%283%296%7D-1%5D)
r = 9% interest rate
Answer:
160
Step-by-step explanation:
70% of 160=112.
A handy trick is to divide the number by the percentage.
Brainliest please I need those points.
The sum of x and 9 divided by 2 is equal to 3x
(x + 9)/2 = 3x
Note the equal sign, what you do to one side, you do to the other. First, multiply 2 to both sides
(x + 9)/2(2) = 3x(2)
x + 9 = 6x
Subtract x from both sides
x (-x) + 9 = 6x(-x)
9 = 5x
Isolate the x. Divide 5 from both sides
9/5 = 5x/5
x = 9/5
9/5 is your answer for x
hope this helps
Step-by-step explanation:
7e=the money she makes from earrings
13n=the money she makes from necklace