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snow_tiger [21]
3 years ago
12

9. Simplify the expression. 4x + 7y - 2 + 6y + 6y - 8x - 5 Your answer

Mathematics
2 answers:
ELEN [110]3 years ago
7 0

Answer:

9 = 15x - 7    10=7x +20

Step-by-step explanation:

if you ever need any more math help

morpeh [17]3 years ago
4 0

Answer:

9. -4x+19y-7

10. 7x+20

Step-by-step explanation:

9. To simplify this expression, simply combine like terms. Add all of the terms with the x variable together, then the terms with the y variable, then the constant terms. I will show this step by step, but usually you do not have to show this work. The order of the terms does not matter.

x variable terms: (4x-8x)+7y-2+6y+6y-5= -4x+7y-2+6y+6y-5

y variable terms: (7y+6y+6y)-4x-2-5=19y-4x-2-5

constant terms: (-2-5)-4x+19y=-4x+19y-7

10. To simplify this expression, expand all terms and then combine like terms. The first term can be expanded by multiplying each term in the parentheses by 2.

Expand terms: 2(5+3x)+(x+10)= 10+6x+x+10

Now, you can combine like terms as done on the last problem. Note that I got rid of the parentheses in the second term, as they did not matter (since there was no term in front of them).

x variable terms: (6x+x)+10+10=7x+10+10

constant terms: (10+10)+7x=7x+20

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Consider a fair coin, such that the probability of observing a head or a tail in a random toss is 0.5. Consider an experiment in
Mariulka [41]

Applying probability concepts, it is found that the correct statements are:

  • c) pa and pb are not equal
  • d) pa is 2/3 and pb is 1/3

-------------------------------------------

  • A probability is the number of desired outcomes divided by the number of total outcomes.

The sample space, that is, the possible outcomes for the coin tosses is given next, considering H for heads and T for tails.

H - H

H - T

T - H

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-------------------------------------------

  • Considering that there is at least 1 tails, the new sample space is:

H - T

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  • pa: probability of one head, two outcomes with 1 head out of three, thus, pa = 2/3.
  • pb: probability that the second is tails, so one outcome(T - T) out of three, thus pb = 1/3.

-------------------------------------------

The correct statements are:

  • c) pa and pb are not equal
  • d) pa is 2/3 and pb is 1/3

A similar problem is given at brainly.com/question/14798120

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