Step-by-step explanation:
Since AB=I, we have
det(A)det(B)=det(AB)=det(I)=1.
This implies that the determinants det(A) and det(B) are not zero.
Hence A,B are invertible matrices: A−1,B−1 exist.
Now we compute
I=BB−1=BIB−1=B(AB)B−1=BAI=BA.since AB=I
Hence we obtain BA=I.
Since AB=I and BA=I, we conclude that B=A−1.
Answer:
706.50 cubic cm.
Step-by-step explanation:
Given that a cylinder shaped juice pitcher has a diameter of 12 cm and a height of 25 cm.
We are to find out the t volume of juice does the pitcher contain when it is 25% full. 3.14 is to be used for pi.
Volume of the cylinder = 
When it is 25% full the volume would be 1/4 of the full volume
=
cubic cm
So volume when 25% full is
706.50 cubic cm.
Answer:
x=7 multiplicity of 2
Step-by-step explanation:
14x - 49 = x^2
Subtract x^2 from each side
-x^2 +14x - 49 = x^2-x^2
-x^2 +14x - 49 = 0
Multiply by -1
x^2 -14x +49 =0
What 2 numbers multiply together to give you 49 and add together to give you -14
7*-7 = 49
-7+-7 = -14
(x-7) (x-7) = 0
Using the zero product property
x-7 = 0 x-7 =0
x-7+7= 0+7 x-7+7 =0+7
x =7 x=7
Answer:
I can not see the question can you repeat it
