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Goryan [66]
3 years ago
8

Need help with these 2

Mathematics
2 answers:
luda_lava [24]3 years ago
4 0
19. 38x - 3y - 34 because 5(7x+3y-8) =!35x+15y-40 and 3(x-6y+2 = 3x -18y +6. Combine alike factors.

20. Yes it is factored correctly.
Arada [10]3 years ago
4 0

Answer:

19 is 38x - 3y - 34

20 would be yes

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Give an example of a time when finding the percentage of a number would be useful. Explain.
kupik [55]
When you're out shopping and something you want to buy is on sale. You can take the original price and give it's percentage to find out how much it really is.
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3 years ago
A coffee company ground up 547,736 coffee beans and distributed it evenly into 560 containers. How many coffee beans are in each
weeeeeb [17]
It is 978.1 per container I’m sure
5 0
2 years ago
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What can be represented as fractions, rational numbers, or irrational numbers?
Delvig [45]
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3 0
2 years ago
Find the inverse of the matrix , if it exists
Montano1993 [528]

Answer:

So, option A is correct.

Step-by-step explanation:

To find the inverse of the matrix, the formula is:

A^{-1} = 1/|A| * Adj A

Inverse of the matrix exists if |A| does not equal to 0

|A| = 7 * 9 -( -2 * -10)

|A| = 63 - 20

|A| = 43

AS |A| ≠ 0

so inverse exist.

now finding Adj A

Adj A = \left[\begin{array}{cc}9&2\\10&7\end{array}\right]

\left[\begin{array}{cc}9/43&2/43\\10/43&7/43\end{array}\right]

So, option A is correct.

8 0
3 years ago
Round 199,988 to nearest tenth
Nadusha1986 [10]

Answer: 199,990

Step-by-step explanation:

You can't round to the nearest tenth because you don't have a decimal added to the number.

I rounded to the nearest tens and got 199,990

3 0
3 years ago
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