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tilsendt
05.05.2020 •
Mathematics
What is the median of the data?
150, 120, 145, 130, 145, 120, 120, 115, 125
A) 120
B) 125
C) 130
D) 145
please help
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Ответ:
Ответ:
B) 125
Step-by-step explanation:
put them in order form greatest to least
150 145 145 130 125 120 120 120 115 cross out the two out side numbers till theres one number in the middle.
Extra : if its like this 1 2 3 4 5 6 there is no direct median so whats between 3 and 4 3.5 it helps me so i really hope it helps u!!
Ответ:
Step-by-step explanation:
to understand thisyou need to know about:quadratic functionPEMDASlet's solve:vertex:(h,k)
therefore
vertex:(-1,4)
axis of symmetry:x=h
therefore
axis of symmetry:x=-1
to find the quadratic equation we need to figure out the vertex form of quadratic equation and then simply it to standard form i.e ax²+bx+c=0vertex form of quadratic equation:
y=a(x-h)²+ktherefore
y=a(x-(-1))²+4y=a(x+1)²+4it's to notice that we don't know what a is
therefore we have to figure it out
the graph crosses y-asix at (0,3) coordinates
so,
3=a(0+1)²+4
simplify parentheses:
simplify exponent:
therefore
our vertex form of quadratic equation is
y=-(x+1)²+4let's simplify it to standard form
simplify square:
simplify parentheses:
simplify addition:
therefore our answer is D)y=-x²-2x+3
the domain of the function
and the range of the function is
zeroes of the function:
factor out x and -1 respectively:
group:
therefore