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2 years ago

PLzzzzzzz help and give an actual answer plzzzzzzzzzzzzzzzzzzzzz its for an exam and i need it really badd

Mathematics

2 answers:

Agata [3.3K]2 years ago

8 0

Answer:

if yu not sure use math way

Step-by-step explanation:

Kazeer [188]2 years ago

5 0

I'm pretty sure it's D

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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

2 years ago

Whole numbers with more digits are ____ than the whole numbers with fewer digits.

Kipish [7]

Whole numbers with more digits are greater than whole numbers with fewer digits.

Unless there is a decimal making the number have more digits then the answer to the blank would be greater than.

3 0

2 years ago

Find the value of x. Then find the angle measures of the polygon.

iogann1982 [59]

Answer:

120+100+120+120+x+x+10=720 (given)

470+2x=720

2x=720-470

x=250/2

x=125

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

Can someone plz explain how to do this?

andre [41]

Subtract y
3x - y + 5 = 0

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2 years ago

Susan made $117 for hours 9 of work.

Irina18 [472]

First we need to figure out how much Susan made per hour

117/9 = 13 dollars per hour

Then find out how much she makes in 7 hours

13 • 7 = 91 dollars

$91 in 7 hours

8 0

2 years ago