Well, you would have to divide to get the answer. What you do to one side you do to the other. So, you would divide 0.85 by 0.85. and then you would divide 200 by 0.85. Then the answer would be estimated to 235.294.
Answer:
B.The matrix is invertible because the determinant is defined.
Step-by-step explanation:
<u>Definition:</u> A matrix is invertible if the determinant is not equal to zero.
Given the matrix:
![A=\left(\begin{array}{ccc}20&5&3\\4&-15&6\\0&25&-9\end{array}\right)](https://tex.z-dn.net/?f=A%3D%5Cleft%28%5Cbegin%7Barray%7D%7Bccc%7D20%265%263%5C%5C4%26-15%266%5C%5C0%2625%26-9%5Cend%7Barray%7D%5Cright%29)
The determinant of the matrix:
![|A|=20\left|\begin{array}{ccc}-15&6\\25&-9\end{array}\right|-5\left|\begin{array}{ccc}4&6\\0&-9\end{array}\right|+3\left|\begin{array}{ccc}4&-15\\0&25\end{array}\right|](https://tex.z-dn.net/?f=%7CA%7C%3D20%5Cleft%7C%5Cbegin%7Barray%7D%7Bccc%7D-15%266%5C%5C25%26-9%5Cend%7Barray%7D%5Cright%7C-5%5Cleft%7C%5Cbegin%7Barray%7D%7Bccc%7D4%266%5C%5C0%26-9%5Cend%7Barray%7D%5Cright%7C%2B3%5Cleft%7C%5Cbegin%7Barray%7D%7Bccc%7D4%26-15%5C%5C0%2625%5Cend%7Barray%7D%5Cright%7C)
![|A|=20(-15*-9-25*6)-5(-9*4-6*0)+3(4*25-0*-15)\\=20(135-150)-5(-36-0)+3(100+0)\\=20(-15)-5(-36)+3(100)\\=-300+180+300\\|A|=180](https://tex.z-dn.net/?f=%7CA%7C%3D20%28-15%2A-9-25%2A6%29-5%28-9%2A4-6%2A0%29%2B3%284%2A25-0%2A-15%29%5C%5C%3D20%28135-150%29-5%28-36-0%29%2B3%28100%2B0%29%5C%5C%3D20%28-15%29-5%28-36%29%2B3%28100%29%5C%5C%3D-300%2B180%2B300%5C%5C%7CA%7C%3D180)
Since the determinant,
, the matrix is invertible because the determinant is defined.
The formula for the area of a rectangle is length x width.
Substitue the length and width into the formula
(X + 5) x 3 = A
The answer would be 3X + 15
Answer:this is quite hard as i cant see the cone but the one you have may be the answer i am not sure of this beacuse i cannot see the cone shape.
Step-by-step explanation:
Answer:
32
Step-by-step explanation:
32 X 2 = 64. 64 - 9 = 55.