Answer: A
Step-by-step explanation:
2x²-2x-9=0
this is a quadratic equation so we will use the quadratic formula .
Δ= b²-4*a*c
let's calculate Δ to khow how many solutions this equations have .
Δ= (-2)²-4*2*(-9)
= 76
we notice that 76>0
so this equation has two solutions : (-b-√76)/4 and (-b+√76)/4
- let's calculte the values :
- (-b-√76)/4=
(-b+√76)/4=
the trick here is to notice that :
= 
= 
= 2
Now we will simplify Δ by factoring by 2
= 
so the answer is a .
Answer: B) It is a multiplicative, because the output is equal to the input times 2.
Step-by-step explanation:
Answer: if its the side length you would add 30+36 if its the area you would do 30x36 let me know any further question's have a great day! ;)
Step-by-step explanation:
I’m going with 22 because 10x2 is 20 then 10x4 is 40 then 40+20 is 60 so the answer would be 22 because I would also have to add the other 2 to the problem. I’m so so so sorry if I did this wrong
Answer:
A. negatively skewed
Step-by-step explanation:
Plot the values of salary against years
You will notice that;
- The graph has a long left tail
- The tail is longer towards the negative direction of the number line
This mean that this graph is a negative skewed graph/left-skewed distribution
In the <u>attached sketch of the plot</u>, join the points with a smooth curve and observe the above mentioned properties.
The x-axis scale ranges from 2000 to 2015 where 0=2000, 1=2001,2=2002......,15=2015
Hope this will give you a visual picture of the negatively- skewed distribution
