X^2 + y^2 = 8
X-y=0 so x = y
replace x = y into X^2 + y^2 = 8
y^2 + y^2 = 8
2y^2 = 8
y^2 = 8/2
y^2 = 4
y = - 2 and y = 2
because x = y
so x = - 2 and x = 2
solutions:
x= - 2 and x = + 2
y= - 2 and y = + 2
Answer:
The value of x is 
Step-by-step explanation:
we know that
Applying the tangent-secant theorem

substitute the values and solve for x



using a graphing tool
to solve the quadratic equation
The solution is 
see the attached figure
The slope is 2, as for every 20 the graph rises, the line goes over 10, and the formula for slope is rise over run.
A=b-2
c=d/3
e=2f+5
hope this helps