Answer:
72
Step-by-step explanation:
You Subtract 18 from 90 and get 72
1. You have that the speed is:
Where 
is the distance and 
is the time.
2. Tory pilots her boat 
before docking, therefore, his time is
3. Emilio continues for another 
, with a total of 
before docking. Therefore, his time is:
4. And his speed is:
5. Solve for 
and substitute the value into the formula of Tory's time:
The answer is: 
Answer:
X = - 3
Step-by-step explanation:
Step-by-step explanation:
Use a Table of Values to Graph the Equation y =3x+1. y=3x+1 y = 3 x + 1. Substitute −2 - 2 for x x and find the result for y y . y=3(−2)+1 y
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)
