Let a=⎡⎣⎢−6396−21⎤⎦⎥. we want to determine if the system ax=b has a solution for every b∈r3. select the best answer. a. there is a solution for every b∈r3 but we need to row reduce a to show this. b. there is a solution for every b∈r3 since 2< 3 c. there is not a solution for every b∈r3 since 2< 3. d. there is a not solution for every b∈r3 but we need to row reduce a to show this. e. we cannot tell if there is a solution for every b∈r3. solution:

b

step-by-step explanation:

2 and 1.

step-by-step explanation:

plug in each answer. 0 doesn't work, 1 does. so does 2. 4 doesn't:

0 = 1 is not true.

2 = 2 is true.

4 = 4 is true.

8 = 16 is not true.

hope this !

1/2*qr*rs

step-by-step explanation:

geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584