You want 9x^2 + bx + 9a to be a perfect square trinomial. Note that 9 x 2 is incorrect and should be written as 9x^2, where "^" represents "exponentiation."
What about a? Are we supposed to find a also?
One way in which to do this problem is to factor 9 out of the trinomial:
9 (x^2 + (b/9)x + a )
Concentrate now on making x^2 + (b/9)x + a into a perfect square trinomial.
x^2 + (b/9)x + a
Take half of the coefficient (b/9) and square the result: [(b/9)/2]^2 = b^2/81.
Then, x^2 + (b/9)x + b^2/81 - b^2/81 + a.
The above quadratic expression can be re-written as
(x + b/9)^2 - b^2/81 + a. This is a perfect square trinomial if
-b^2/81 + a = 0. Solve for b: b^2/81 = a,
b/9 = sqrt(a)
b = 9 sqrt a
The equation is written below,
30.16 = 17.56 + 5x
First, subtract 17.56 from both sides of the equation,
30.16 - 17.56 = 17.56 + 5x - 17.56
This will give us 12.6 = 5x
Then, divide both sides of the equation by 5.
12.6/5 = 5x/5
Simplifying,
2.52 = x
Thus, the value of x is 2.52.
If u r trying 2 find the absolute value of a positive number, the absolute value of it will not be a negative, it will always be a positive.
Answer:
98.5 degrees.
Step-by-step explanation:
Add up these four numbers and divide by the number of temperatures given. There are four given temperatures. It all adds up to 394. When division occurs, you get 98.5 degrees which would be your answer.