Answer:
(-2, 7); (See attachment)
Step-by-step explanation:
x + 2y = 12
7x + 2y = 0
x + 2y = 12
x = -2y + 12
Solve for y:
7x + 2y = 0
7 (-2y + 12) + 2y = 0
-12y + 84 = 0
-12y = -84
y = 7
Solve for x:
x = -2y + 12
x = -2 (7) + 12
x = -2
x = -2, y = 7
No because it would be
if you knew that
ax^2+bx+c was a trinomial square, then the factored form would be

or

so
if w^2-9w+81 is perfect square, factored form is either

or

aka

or
expand them
(x+9)^2=x^2+18x+81, wron middle term
(x-9)^2=x^2-18x+81 wrong
so it is not
<h3>
Answer: B) 9</h3>
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Work Shown:
f(x) = x^3 - x^2 + x - 1
f ' (x) = 3x^2 - 2x + 1
f ' (2) = 3(2)^2 - 2(2) + 1
f ' (2) = 9
In step 2, I used the power rule
Answer:
7
Step-by-step explanation:
Explanation of
f(x) = 2x + 1 for x ≥ 3
f(x) = 3x - 3 for x < 3
when the x in f (x) is greater than or equal to 3 we use the equation 2x + 1
When the x in f (x) is less than 3 we use the equation 3x - 3
we want to find f ( 3 )
because x is greater equal to 3 we use the equation 2x + 1
so to find f ( 3 ) we simply plug in the value of x into the equation
f ( 3 ) = 2(3) + 1
multiply
f ( 3 ) = 6 + 1
add
f ( 3 ) = 7