Answer:
vertex:(2,-4)
Focus:(2,- )
Axis of symmetry :x=2
Directrixt: y=-
Step-by-step explanation:
ans is b...multiply first eqn by -2
=》 -6x -4y = -48...eqn 3
add eqn 2 and 3...
=》 -2y = -18
=》 y = 9...x =2
Remark
There must be 12 such boxes. Each one has a volume of 4 * 4 * 4 = 64 in^3
Proportion
1 box is 64 in^3
12 boxes = x
1/12 = 64/x Cross multiply
x = 12 * 64
x = 768 in^3
Note: We are not concerned with how to stack these boxes. We only want to know the volume.
Answer:
It should be x=11 instead of x=-11, so he is not correct because he made a sign error.
Step-by-step explanation:
I took the test
Answer:
a)
hearing one song = 2%
90/2 = 45
hearing song 45 times = 90%