2x-y=8...(1)
x+y=7....(2)
from (2)
y=7-x....(3)
put (3) into (1)
2x-(7-x)=8
2x-7+x=8
2x+x=8+7
3x=15
x=5.....(4)
put (4) into (2)
x+y=7
5+y=7
y=7-5
y=2
Hope it helps c:
Answer:
The graph of the system in the attached figure
Step-by-step explanation:
we have
isolate the variable y
----> equation A
This is the equation of a vertical parabola open down (because the leading coefficient is negative)
The vertex represent a maximum
the vertex is the point (0,2)
---> equation B
This is the equation of a circle centered at (0,0) with radius 3 units
The solution of the system of equations is the intersection points both graphs
using a graphing tool
The solutions are the points (-2.05,-2.19) and (2.05,-2.19)
see the attached figure
Define the tangent line equation at the given point; and find its x intercept. use that x intercepts as a new guess for X, and repeat and tangent y = f'(a)(x-a) + f(a) 0 = f'(a)(x-a) + f(a) 0 - f(a) = f'(a)(x-a) - f(a)/ f'(a) = x-a a - f(a)/ f'(a) = x ...<span>X_2=1-\frac{1^5-1-7}{5(1)-1}.</span>
Answer:
4x-3
Step-by-step explanation:
First, you Subtract the numbers
(-3-7)+(4x+7)
(-10)+(4x+7)
Then you add the numbers
-10+4x+7
-3+4x
Finally, you rearrange the numbers
-3+4x
4x-3
It can be rounded to 270,000 because 4 is less than half. (4 and below drops it down)