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2 years ago

Pls help is it a b or c will give brainliest btw

Mathematics

2 answers:

monitta2 years ago

8 0

Answer:

Step-by-step explanation:

because there was no mistake

Lelu [443]2 years ago

3 0

Answer:

The answer is C. Annie didn't make a mistake.

Step-by-step explanation:

To get k, we subtract 7.5 from both sides of the equation.

10 - 7.5 equals 2.5.

So, Annie is correct.

#teamtrees #WAP (Water And Plant)

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DochEvi [55]

Answer:

$\left[\begin{array}{ccc}5&7\\5&-8\\3&-9\end{array}\right] \left[\begin{array}{ccc}c\\d\end{array}\right] =\left[\begin{array}{ccc}-16\\3\\-15\end{array}\right]$

This tells us that:

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Step-by-step explanation:

So we are saying we have scalars, c and d, such that:

$c\left[\begin{array}{ccc}5\\5\\ 3\end{array}\right]+d\left[\begin{array}{ccc}7\\-8\\-9\end{array}\right]=\left[\begin{array}{ccc}-16\\3\\-15\end{array}\right]$ .

So we want to find a way to express this as:

Ax=b where x is the scalar vector, $\left[\begin{array}{ccc}c\\d\end{array}\right]$ .

So we can write this as:

$\left[\begin{array}{ccc}5&7\\5&-8\\3&-9\end{array}\right] \left[\begin{array}{ccc}c\\d\end{array}\right] =\left[\begin{array}{ccc}-16\\3\\-15\end{array}\right]$

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