Answer:
My graphing calculator tells me the function is
.. f(x) = x^2 +x -2
_____
Since we recognize the y-intercept as being (0, -2), we only need to find the coefficients of x and x^2.
If you want to do this by hand, you can use
.. y = ax^2 +bx -2
to write 2 equations in a and b for the (x, y) values (1, 0) and (3, 10).
.. 0 = a +b -2
.. 10 = 9a +3b -2
To solve by substitution, you can let a = 2-b, and you have
.. 10 = 9(2 -b) +3b -2
.. 6b = 6 . . . . . . . . . . . add 6b-10
.. b = 1
.. a = 2 -1 = 1
Step-by-step explanation:
Answer:
∠
° or B
Step-by-step explanation:
Answer:
2)
Original Mean: 867
Original Median: 543
New Mean: 790
New Median: 400
3)
Original Mean: 22.6
Original Median: 22.5
New Mean: 21.6
New Median: 22
<span>In a triangle the sum of two sides is always greater than the third side.
Let x represent </span><span>possible measures for the third side of a triangle
</span><span>
20-15 < x < 20+15
5 < x < 35 </span>← answer
Let us consider the distance between kensington and greenwich be x
since the given figure is a right angled triangle,we use pythagoras theorem to find the answer
so by pythagoras theorem
x^2= 20^2+40^2
x^2=400+1600
x^2=2000
x=root of 2000=20root 5mi
answer is option (b)
