Answer:
The determinant is 15.
Step-by-step explanation:
You need to calculate the determinant of the given matrix.
1. Subtract column 3 multiplied by 3 from column 1 (C1=C1−(3)C3):
![\left[\begin{array}{ccc}-25&-23&9\\0&3&1\\-5&5&3\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-25%26-23%269%5C%5C0%263%261%5C%5C-5%265%263%5Cend%7Barray%7D%5Cright%5D)
2. Subtract column 3 multiplied by 3 from column 2 (C2=C2−(3)C3):
![\left[\begin{array}{ccc}-25&-23&9\\0&0&1\\-5&-4&3\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-25%26-23%269%5C%5C0%260%261%5C%5C-5%26-4%263%5Cend%7Barray%7D%5Cright%5D)
3. Expand along the row 2: (See attached picture).
We get that the answer is 15. The determinant is 15.
Answer:
C $1187
Step-by-step explanation:
diameter = 12ft
radius = 6 ft
area = πr²
= 3.14×6×6
= 113.04 ft²
paving stones is $10.5 per ft²
paving stones cost = 113.04×10.5 = 1186.92
; the nearest dollar do the paving stones cost is $1187
Answer:
27
Step-by-step explanation:
formula is a ^3
Answer:
B
Step-by-step explanation:
The lines intersect at exact one point. This is true because the lines do not have the same slope. This means the lines are not parallel and must cross at one point.
Calculate slope for Line 1 by
where
and
.

Calculate slope for Line 2 by
where
and
.
