Our matrix C is the encoder. Let X be our secret message and let B be our encoded message. Therefore the relationship between the 3 can be represented as:
CX = B
So we want to solve for X (our secret message). So using matrix algebra:
X = C^-1*B
where C^-1 is the inverse of C.
C^-1 = | 3 -2 |
|4 -3 |
So we take C^-1 and multiply it by matrix B to get X. Matrix B is already given to us. So just multiply those two. I used a calculator to get:
X = | 20 8 5 3 15 12 15 |
| 18 9 19 2 12 21 5 |
And since A = 1, B = 2, C = 3, etc....
We decode our message and it says:
X = | T H E C O L O |
| R I S B L U E |
So the answer is: The color is blue (D)
The temperature at midnight would be -14*F. Subtract 10 from -4 and you get -14*F
Answer:
y = 10
Step-by-step explanation:
-7x + 3y = 30
(-7 x 0) + 3y = 30
0 + 3y = 30
3y = 30
y = 10
Answer:
I believe its B, But I am unsure since I haven't done geometry in a couple years.
Answer:
Step-by-step explanation:
Given
Dimension of unpainted area:
--- Square
Required
Determine an expression to solve for x
First, calculate the area of the unpainted space;
The unpainted area, added to the painted area, equals the total area.
So, we have:
Hence, the expression is:
