Answer:

Step-by-step explanation:
Question: 5 - 7(z+1) = 7(-9-3z)
We multiply the number in front of the bracket first, since that is multiplication.
--> 5 -7z -7 = -63 - 21z
--> -7z -2 = -63 - 21z
Now, we move all the z and all the numbers to each side.
--> -7z +21z = -63 +2
--> 14z = -61
--> z = -61/14
This cannot be simplified further, so z is -61/14.
The height of a semisphere is equal a radius of this hemisphere.
But... if we can talk about the height of the hemisphere ;)
R = 0.8m = 80cm then height of hemisphere is equal 0.8m = 80cm.
I doesn't seem right to me. You can use an online calculator where all you do is input the values. Search for "parabolic motion calculator" or something along those lines. Hope it helps.
The answer is that if polygon ABCD rotates 90 counterclockwise
to create a'b'c'd', then the coordinates of d will be at the location (-2, 2)
and if the polygon ABCD rotates 180 clockwise to create a'b'c'd'
the coordinate of A will become (3,-1).