(x-6)(x+6)
solve just to make sure
x^2+6x-6x-36
combine like terms
x^2-36
:) ta da
Answer:
27=x
Step-by-step explanation:
We can use the triangle angle bisector theorem
x+8 2x-5
--------- = ------------
10 14
Using cross products
14(x+8) = 10 (2x-5)
Distribute
14x +112 = 20x -50
Subtract 14x from each side
14x-14x +112 = 20x-14x -50
112 = 6x-50
Add 50 to each side
112+50 = 6x-50+50
162 = 6x
Divide by 6
162/6 = 6x/6
27=x
Step-by-step explanation:
7c-7+6c-8=180°
13c-15=180°
13c=180+15
13c=195
c=15
If we take 401 to be the 100%, what is 21 off of it in percentage?
<span>3x + 2y = 6
</span><span>4x + y = 1
</span>
Solve the second equation for y:
y = -4x + 1
Substitute -4x + 1 for y in the first equation.
3x + 2(-4x + 1) = 6
3x - 8x + 2 = 6
-5x = 4
x = -4/5
Now substitute x with -4/5 in the first original equation.
3x + 2y = 6
3 * (-4/5) + 2y = 6
-12/5 + 2y = 6
-12 + 10y = 30
10y = 42
y = 42/10
y = 21/5
Solution: (-4/5, 21/5)
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