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nevsk [136]
3 years ago
13

I have no idea how to do this. can someone please explain?​

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
5 0

Answer:

no solution

Step-by-step explanation:

sqrt(3x+1) +7 = 5

Subtract 7 from each side

sqrt(3x+1) +7 -7= 5-7

sqrt(3x+1)  = -2

The sqrt cannot be negative so there is no solution

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The point A has co-ordinates (-4,6) and the point B has co-ordinates (7,-2).
Serhud [2]

Answer:

√185 or 13.60 units to the nearest hundredth.

Step-by-step explanation:

For the points (x1,y1) and (x2,y2) the length between the points is given by:

L = √ [ (x2-x1)^2 + (y2-y1)^]

So here we have:

Length of AB  √ [ (7- - 4)^2 + (-2 - 6)^2]

=  √ (121 + 64)

= √185.

3 0
3 years ago
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Reflection across the x-axis followed by a reflection across the y-axis.
8 0
3 years ago
A poker hand consisting of 7 cards is dealt from a standard deck of 52 cards. Find the probability that the hand contains exactl
77julia77 [94]

Answer:

The probability is 2,010,580/13,378,456

Step-by-step explanation:

Here is a combination problem.

We want to 7 cards from a total of 52.

The number of ways to do this is 52C7 ways.

Also, we know there are 12 face cards in a standard deck of cards.

So we are selecting 3 face cards from this total of 12.

So also the number of cards which are not face cards are 52-12 = 40 cards

Out of all these 40, we shall be selecting exactly 4. The number of ways to do this 40C4

Thus, the required probability will be;

(40C4 * 12C3)/52C7 = (91,390 * 220)/133,784,560

= 20,105,800/133,784,560 = 2,010,580/13,378,456

7 0
4 years ago
Evaluate 5x when x =8
andrey2020 [161]

Answer:

:( help me on my question

Step-by-step explanation:

4 0
3 years ago
Is brightness of light qualitative or quantitative
Marta_Voda [28]
Brightness of light would be an example of a qualitative characteristic. Quantitative is more used with numbers for example, numbers of things, how many of something, while as qualitative is used for characteristics, such as, color, brightness.

Helpful hint: remember QUANT = HOW MANY OF
QUAL = QUALITY = LOOKS

Hope this helps! Let me know if you don't understand !
5 0
3 years ago
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