Call the 1% account X
After 3 years the interest it earned is X times 1% for 3 years
=X(.01)(3)
=0.03X
The 2.5% account has (1000 - X) dollars
It earns (1000-X(.025)(3)
=(1000 - X)(.075)
=75-.075X
The total of the interest is 55
Therefore .03X + 75 -.075X = 55
- .045X = 55 - 75
-.045X = -20
.045X = 20
45X =20000
X = 20000 / 45
X = $ 444.44
Therefore the amount invested id the 2.5% account is
1000 - 444.44
=$ 555.56
Answer:
Explanation: We are adding two linear functions: A the original function describing Abdul's deposits, and B the deposits made by his wife.
The resulting function is a larger slope due to the added deposit rate.
Step-by-step explanation:
x/6-1=1/3(9-3x)
3(x-1) = 6(9-3x)
3x-3 = 54 - 18x
3x+18x=54+3
21x=57
X=57/21
Answer:
It is a symbol used to denote an angle (or something else)
Step-by-step explanation:
Alpha(α) is a greek letter, it's one of the letters used to denote angles. Other such letters you'll often see in math are Beta (β), Gamma (γ), Delta (δ), these are used to denote angles. Also, pi (π), which is a mathematical constant. The letters phi (φ) and theta (θ) are also used for angles very often, especially in formulas. You'll see some of these in physics too.
It can be used as variable too, not necessarily for angles, but it's mostly used for them.
NO they are not proportional
3/7 = .4285714
6/9 = .66666
