Answer:
$6 a week.
Step-by-step explanation:
subtract from week 4-12 and you get $6 a week.
Answer:
-28 - 16x
Step-by-step explanation:
7-7(5+x)-9x
Distribute
7 - 35 -7x -9x
Combine like terms
-28 - 16x
Since each vector is a member of

, the vectors will span

if they form a basis for

, which requires that they be linearly independent of one another.
To show this, you have to establish that the only linear combination of the three vectors

that gives the zero vector

occurs for scalars

.

Solving this, you'll find that

, so the vectors are indeed linearly independent, thus forming a basis for

and therefore they must span

.
"necessary"
It is not a "sufficient" condition. Another condition is that the figure be a plane quadrilateral.
Answer:34
Step-by-step explanation:
First you multiply
-7•-3=21
Then you just add 9+4+21
9+4=13
21+13=34