Hello from MrBillDoesMath!
Answer:
10^7 choices
Discussion:
The first digit can be any of 10 choices : (0,1,2,3,4,5,6,7,8,9)
The second digit can also be any of the same 10 choices as numbers can be repeated.
So for a seven digit number there are a total of
10 * 10 * 10 * 10 * 10 * 10 * 10 ( 7 times)
= 10^7 numbers
Thank you,
MrB
Answer: the best option is the 15% off card because it would lealve you at 311.95$ whereas the 50$ off would leave you at 317$
In the plane, we have everywhere. So in the equation of the sphere, we have
which is a circle centered at (2, -10, 0) of radius 4.
In the plane, we have , which gives
But any squared real quantity is positive, so there is no intersection between the sphere and this plane.
In the plane, , so
which is a circle centered at (0, -10, 3) of radius .
Step-by-step explanation:
z = b - ma
z - b = ma
z - b / m = a