1. 2/7
2. 2/15
3. 5/24
4. 2/11
They are the same just one has more zeroes.
Answer:
x=400000\\y=600000\\z=1000000
Step-by-step explanation:
Given that a trust account manager has $2,000,000 to be invested in three different accounts. The accounts pay 6%, 8%, and 10%, and the goal is to earn $172,000 with the amount invested at 10% equal to the sum of the other two investments.
To accomplish this, assume that x dollars are invested at 8%, y dollars at 10%, and z dollars at 6%.
The equations formed would be

Interest amount = 

these three can be written in matrix form as
![\left[\begin{array}{ccc}1&1&1\\6&8&10\\1&1&-1\end{array}\right] =\left[\begin{array}{ccc}200000\\17200000\\0\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%261%261%5C%5C6%268%2610%5C%5C1%261%26-1%5Cend%7Barray%7D%5Cright%5D%20%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D200000%5C%5C17200000%5C%5C0%5Cend%7Barray%7D%5Cright%5D)
The inverse of the matrix is
![\left[\begin{array}{ccc}9/2&-1/2&-1/2\\-4&1/2&1\\1/2&0&-1/2\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D9%2F2%26-1%2F2%26-1%2F2%5C%5C-4%261%2F2%261%5C%5C1%2F2%260%26-1%2F2%5Cend%7Barray%7D%5Cright%5D)
X = A inverse *B
Using this we get

Answer:
2x²-x-5
Step-by-step explanation:
When multiplying 2 brackets, use the FOIL method. That is, multiply the FIRST terms of each bracket, then the OUTER ones (first term of first bracket and last term of second bracket), INNER (last term of first bracket and first term of second bracket) and finally the LAST terms of each bracket. Thereafter, add up the like terms.
Answer:
The tree grew 8 and 3/4 inches.
Step-by-step explanation:
To get this answer, first subtract the whole numbers.
21 - 12 = 9
Now do the same with the fractions.
1/8 - 3/8 = -2/8
Now add those two together.
9 - 2/8 = 8 6/8 = 8 3/4