Find all the side lengths and angle measures using trig (law of sines and cosines, assuming they are all only one-triangle possibilities).
Answer:
x= 3
Step-by-step explanation:
Simplify the equation:
3(2x-5)- 4x+8= -1 becomes 6x-15-4x+8= -1
Then, combine like terms.
6x-4x= 2x
-15+8= -7
So now your equation becomes 2x-7= -1
Now, we need to isolate our variable (x).
Add 7 to both sides.
-7+7 cancels out and -1+7= 6
and now you have 2x=6
To solve for x, you need to divide by 2 on both sides and you get an answer of 3.
x= 3
:)
Simply solve for x:
-x^2 + 9 = 0 => x = 3 and x = -3;
plug x = 3 and x = -3 into the original equation you get 3 = 3 and -9 = -9, respectively;
So, the two intersecting points are (-3, -9), (3, 3).
And of course, the parabola opens down since its square term is minus.
Answer:
the middle ones
Step-by-step explanation:
The solution to system is x = 0 and y = -1
<em><u>Solution:</u></em>
<em><u>Given system of equations are:</u></em>
-8x + 2y = -2 ----------- eqn 1
4x + 4y = -4 ---------- eqn 2
We have to solve the system of equations
We can solve the equations by elimination method
<em><u>Multiply eqn 2 by 2</u></em>
8x + 8y = -8 ------ eqn 3
<em><u>Add eqn 1 and eqn 3</u></em>
-8x + 2y = -2
8x + 8y = -8
( + ) ---------------
0x + 2y + 8y = -2 - 8
10y = -10
Divide both sides by 10
y = -1
<em><u>Substitute y = -1 in eqn 1</u></em>
-8x + 2(-1) = -2
-8x - 2 = -2
-8x = -2 + 2
x = 0
Thus the solution to system is x = 0 and y = -1