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MAXImum [283]
3 years ago
13

50 points.... just a lil confused

Mathematics
1 answer:
Zarrin [17]3 years ago
8 0

Answer:

  • One solution: (0.4, -4.8)

Step-by-step explanation:

<u>Given equations</u>

  • y = -2x - 4
  • y = 1/2x - 5

This system has one solution since the two lines represented by the equations have different slopes.

<u>Solution:</u>

  • -2x - 4 = 1/2x - 5
  • -2x - 1/2x = -5 + 4
  • -2.5x = -1
  • 2.5x = 1
  • x = 1/2.5
  • x = 0.4

<u>And y is:</u>

  • y = -2*0.4 - 4 = -4.8

<u>The point is:</u>

  • (0.4, -4.8)
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What is the fourth term in the binomial expansion of (2x – y) 7?
nata0808 [166]

Answer:

(7C4) (2x)^4 (-y)^{7-4}

And replacing we got:

35 (2^4) x^4 (-y)^{-3}

And then the final term would be:

-560 x^4 y^3

Step-by-step explanation:

For this case we have the following expression:

(2x-y)^7

And we can use the binomial theorem given by:

(x+y)^n =\sum_{k=0}^n (nCk) x^k y^{n-k}

And for this case we want to find the fourth term and using the formula we have:

(7C4) (2x)^4 (-y)^{7-4}

And replacing we got:

35 (2^4) x^4 (-y)^{-3}

And then the final term would be:

-560 x^4 y^3

8 0
3 years ago
What is this answer i need to know please and how you figured it out?
Delicious77 [7]
What is your question?????
5 0
3 years ago
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-(x+3) = 2x-6 what is x
Makovka662 [10]

Answer:

x=1

Step-by-step explanation:

So, first you make sure to multiply the parenthesis by the negative so then it would be,

-x-3=2x-6

Then you add the -3 from the right to the other side

so, -x=2x-3

Then you want all the X variables to one side so you subtract the 2x to both sides.

so, -3x=-3

divide both by -3

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7 0
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3 0
2 years ago
You have a jar of Marbles in front of you 2 are Cordovan, 9 are yellow, 3 are white and 7 are red. What is the probability, as a
liubo4ka [24]

Answer:

2/35

Step-by-step explanation:

Assuming that this is without replacement,

The total amount of marbles is 2+9+3+7, or 21.

9 are yellow, 3 are white. this makes 12.

The probability of selecting a white or yellow marble is 12/21.

Now without replacement (comment if it is with replacement.), there are 20 marbles left, and 2 are Cordovan. This means there is a 2/20 chance then of picking a Cordovan marble.

After multiplying the fractions we get

(12/21) * (2/20) = 2/35.

There is a 2/35 chance of selecting a yellow or white, then a cordovan marble.

4 0
3 years ago
Read 2 more answers
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