Hi there!
I calculated your equation on MathPapa Algebra calculator(you can find the link here:https://www.mathpapa.com/algebra-calculator.html) and I got the answer D. -24 - 57i
Answer:
14.69 seconds
Step-by-step explanation:
The weighted mean is used to calculate the mean of numbers which don't have the same "weight" or statistical relevance. In this case, that relevance is based on the sample size of each group from which the mean reaction times were obtained.
For all three samples, the weighted mean is obtaining by multiplying each one of the mean reaction times by its <em>n value, </em>adding them, and dividing that result by the sum of all n values.

9)
(y^-3)^6
y^-18
1/y^18
10)
(-x^6)^3
-x^18
11)
(q^9)^2
q^18
12)
(y^-5)^-10 y^10
y^50 • y^10
y^60
-28 x^2 + 42 x^3 + 21 x^4 is your Answer
Answer:
option C
Step-by-step explanation:
<u>Given </u><u>:</u><u>-</u><u> </u>
And we need to tell which graph best matches the graph we drew. Firstly let's convert it into a quadratic equation by opening and simplifying the brackets.
y = ( x + 2) ( x - 3)
y = x ( x - 3)+2( x - 3)
y = x² - 3x + 2x -6
y = x² - x - 6
Now plot its graph. For that refer to attachment.
<u>Things </u><u>we </u><u>can</u><u> </u><u>interpret</u><u> </u><u>:</u><u>-</u><u> </u>
- The constant in the equation is -6. So the graph will cut y axis 6 units below the X axis . At (-6,0)
- From the given options , option C matches the above point .
<u>Therefore</u><u> the</u><u> </u><u>correct</u><u> </u><u>option</u><u> </u><u>is </u><u>(</u><u>C)</u><u> </u><u>.</u>