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natta225 [31]
2 years ago
10

Write and solve an equation to find the value of x. Show your work.

Mathematics
1 answer:
brilliants [131]2 years ago
8 0

Answer:

x = 9

Step-by-step explanation:

(13x + 2) + (5x -7 ) + (3x-4) = 180°( sum of angles in a triangle)

13x + 2 + 5x - 7 + 3x - 4 = 180

13x + 5x +3x + 2 - 7 - 4 = 180

21x - 9 = 180

add 9 to both sides

21x - 9 + 9 = 180 + 9

21x = 189

Divide through by 21

x = 9

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2: A bag contains 5 black counters, 4 blue counters, and
drek231 [11]

Answer:

The probability that the counter  was blue is \mathbf{\frac{2}{5}}

Step-by-step explanation:

Number of black Counters = 5

Number of blue Counters = 4

Number of white Counters = 1

We need to write down the probability that the counter  was blue.​

First find Total Counters

Total Counters = Number of black Counters + Number of blue Counters + Number of white Counters

Total Counters = 5+4+1

Total Counters = 10

Now, we need to find probability that the counter taken was blue

The formula used is:

Probability= \frac{Number\:of\:favourable\:outcomes}{Total\:outcomes}

There are 4 blue counters in the back, so Favourable outcomes = 4

Probability= \frac{Number\:of\:favourable\:outcomes}{Total\:outcomes}\\Probability= \frac{4}{10}\\Probability= \frac{2}{5}

The probability that the counter  was blue is \mathbf{\frac{2}{5}}

5 0
2 years ago
Which problem is solved using this model?
AfilCa [17]
That would be 1/2 divided by 3

Its A
7 0
3 years ago
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Plzz help............​
Vitek1552 [10]

Answer:

14. (8,9,10)

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5 0
2 years ago
7 cards are drawn from a standard deck of 52 cards. How many different 7-cars hands are possible if the drawing is done without
adell [148]

Answer:

5040

Step-by-step explanation:

every card in a 52 deck, is unique, and there are 7 cards drawn, without replacement, so your answer is 7!, 7! = 7*6*5*4*3*2*1=5040

5 0
2 years ago
Me pueden ayudar con estos problemas
Leokris [45]

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