If y equals 14, what does x equal in the following equation?

Mathematics

1 answer:

Elza [17]3 years ago

8 0

Answer: none of these are right, the correct answer would be 7

Step-by-step explanation:

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Please help: linear algebra problem. (Linear combinations)

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:

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

$b=\left[\begin{array}{ccc}-16\\3\\-15\end{array}\right]$

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:

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

3 0

3 years ago

If Jay had 5 cards and Jill had 10 cards. What is the product?

cupoosta [38]

Hello there,

The word "product" mean's to multiply.

So we are going to do 5 x 10.

This will give us 50 because when we do
10+10+10+10+10 is give's us 50. That is
what multiplication mean's.

Hope this helps

Your correct answer will be 50 card's

~Jurgen

5 0

3 years ago

25pts for correct answer with explanation Find the value of x when 2(x - 3) + 1 = 3x + 4

trapecia [35]

The answer is A) -1.

3 0

3 years ago

If a point is originally located at (2,9) and is translated 4 units to the right and 7 units up, what would its new

aliina [53]

Given:

The point is (2,9).

It is translated 4 units to the right and 7 units up.