Http://www.icoachmath.com/math_dictionary/equivalent_equations.html
Here's a website that might help
Step-by-step explanation:
Let's look at what we know. We know that...
P=2000
r=0.04 (Change 4% to a decimal)
t=7 (25 years minus 18 years equals 7)
n=1
Since we are compounding each year, we need to use this equation: ![P(1+\frac{r}{n} )^{nt}](https://tex.z-dn.net/?f=P%281%2B%5Cfrac%7Br%7D%7Bn%7D%20%29%5E%7Bnt%7D)
Now just plug the numbers in: (Answer to #1:) ![2000(1+\frac{0.04}{1} )^{(1*7)}](https://tex.z-dn.net/?f=2000%281%2B%5Cfrac%7B0.04%7D%7B1%7D%20%29%5E%7B%281%2A7%29%7D)
This equals 2631.86
When we round, this equals to $2,632. (Answer to #2).
Answer:
1
Step-by-step explanation:
2(2x+1)=x+5
4x+2=x+5
3x=3
x=1
Answer: C = 97.34 inches
Step-by-step explanation:
C = πd
= 3.14(31)
= 97.34
For this case we have to:
n: Represents the weight of Mary in Kg.
If your sister weighs 15 kg less we have:
![y = n-15](https://tex.z-dn.net/?f=y%20%3D%20n-15)
Where "y" represents the weight of his sister in kg.
To find how many times Mary is heavier than her sister, we must divide Mary's weight by her sister's weight.
We have then:
![N= \frac{n}{n-15}](https://tex.z-dn.net/?f=N%3D%20%5Cfrac%7Bn%7D%7Bn-15%7D)
Answer:
Mary is
times heavier than her sister.