Hello again,
"katie deleted your answer to the question Hello,a=2, b=8, c=-1Indeed,y=f(x)=ax...
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Answer is a=2, b=8 and c=-1
Indeed:
y=f(x)=ax²+bx+c
Since (-2,-9) is the vertex,
y=k*(x+2)²-9
Or f(-1)=-7 ==> -7=k*(-1+2)²-9 ==> k=2
f(x)=2(x+2)²-9=2*(x²+4x+4)-9=2x²+8x+8-9
<u>f(x)=2x²+8x-1</u>
A proof: the picture is following.
Answer:
Step-by-step explanation: He goes up 3 floors and he is currently on the fith one so he is now on the 8th floor
8+2 because he still has to go down to floors to get to the underground floor
He has to go down 10 floors
Answer:
111,117,177,777,771,711,717,171
Step-by-step explanation:
Answer:
32
Step-by-step explanation:
40/5 = 8
divided by 5 because 20% x 5 is 100%
8x4 = 32
80% = 32