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salantis [7]
3 years ago
5

Urgent!!! What is the missing angle?

Mathematics
2 answers:
o-na [289]3 years ago
6 0
All triangles equal 180 degrees.
So to get the answer set all angles to 180.
3x+2x+x=180
Simplify: 4x=180
Divide and you get your answer.
X=45
Then you can plug in x for any angle.
mrs_skeptik [129]3 years ago
3 0

Answer: all angles must ad up 20 180

Step-by-step explanation:

I looked it up

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The speed of the current in a river is 6 mph. A ferry operator who works that part of the river is looking to
Morgarella [4.7K]

Answer:

  • 9 mph

Step-by-step explanation:

Let he speed of the boat on the lake is x.

<u>Considering the speed of the current it will take him:</u>

  • 22.5/(x + 6) + 22.5/(x - 6) = 9
  • 2.5 / (x  + 6) + 2.5 / (x - 6) = 1
  • 2.5(x - 6 + x + 6) = (x + 6)(x - 6)
  • 2.5*2x = x² - 36
  • x² - 5x - 36 = 0
  • x = (5 ± √(5² + 4*36))/2 = (5 ± 13) / 2
  • x = (5 + 13)/2 = 9 mph (negative root is discarded as the speed should be positive)
7 0
2 years ago
Evaluate <br> -2/5-4/5+(-9/10)
Sphinxa [80]
ANSWER-

- 21/10 or -2.1









4 0
3 years ago
Please help<br><br> a14=<br><br> 1<br> 2<br> 5
Butoxors [25]

ANSWER

a_{14} = 5

EXPLANATION

The given matrix is a 4 by 4 matrix.

We want to find

a_{14}

This is the entry in Row 1 Column 4.

We trace row 1 Column 4 and identify the entry in their intersection.

This entry is 5

a_{14} = 5

3 0
3 years ago
Find the product of 6/9 and 3/8 . Express your answer in simplest form.A.6/24 B.1/6 C.18/72 D.1/4
leonid [27]

Answer:

D.) 1/4

Step-by-step explanation:

6/9 x 3/8

6(3) /8(9)

= 18/72  

18/18=1

72/18=4

= D.) 1/4

8 0
3 years ago
Read 2 more answers
an oil company conducts a geological study that indicates that an exploratory oil well should have a 20% chance of striking oil.
bazaltina [42]

Answer:

4.92% probability that the third strike comes on the seventh well drilled

Step-by-step explanation:

For each drill, there are only two possible outcomes. Either it is a strike, or it is not. Each drill is independent of other drills. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

20% chance of striking oil.

This means that p = 0.2

What is that probability that the third strike comes on the seventh well drilled

2 stikers during the first 6 drills(P(X = 2) when n = 6)[/tex]

Strike during the 7th drill, with 0.2 probability. So

P = 0.2P(X = 2)

In which

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 2) = C_{6,2}.(0.2)^{2}.(0.8)^{4} = 0.2458

Then

P = 0.2P(X = 2) = 0.2*0.2458 = 0.0492

4.92% probability that the third strike comes on the seventh well drilled

3 0
3 years ago
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