Answer:
The value of a is 10.
Step-by-step explanation:
We are given with the following pair of the linear system of equations below;
and
.
Also, the solution is given as (a, -1).
To find the value of 'a', we have to substitute the solution in the equation because it is stated that (a, -1) is the solution of the given two equations.
So, the x coordinate value of the solution is a and the y coordinate value of the solution is (-1).
First, taking the equation;
Put the value of x = a and y = -1;
(-1) = -(a) + 9
a = 9 + 1 = 10
Now, taking the second equation;

Put the value of x = a and y = -1;

0.5a = 6 - 1
0.5a = 5
a = 10
Since we get the value of a = 10 from the equations, so the value of a is 10.
Answer:
Step-by-step explanation:
Supplement angle is 57degree 15'
X^2-9=0 add 9 to both sides
x^2=9 take the square root of both sides
x=±3
(Credit to guy/girl above) 63 miles 10 1/2 x 6 is 63.
Answer: x=−1 and y=4
Step-by-step explanation: