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fomenos
3 years ago
10

A test consists of six

Mathematics
1 answer:
Brums [2.3K]3 years ago
5 0
True/false questions grant a 50% chance for each question. If there are 6 questions, the probability of getting 3 right is 50%. You can find the answer by multiplying the percentages for each outcome.

50% × 50% = 25%

The student ultimately has a 25% chance of getting 3 of the 6 true/false questions correct.
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Two ships leave the same port at the same time. Two hours later ship A has traveled 12 miles and ship B has traveled 8 miles.
sashaice [31]

Answer:

the angle between their paths is <em>100.8°</em>

Step-by-step explanation:

From the given information, you can construct a triangle, just like the one in the figure.

We will use the <em>Cosine Rule</em> which is:

c² = b² + a² - 2 b c cos(θ)

where

  • c = 16 miles
  • b = 8 miles
  • a = 12 miles

Therefore,

2 b c cos(θ) = b² + a² - c²

cos(θ) = (b² + a² - c²) / 2 b c

θ = cos⁻¹( (b² + a² - c²) / (2 b c) )

θ = cos⁻¹( (8² + 12² - 16²) / 2(8)(16) )

<em>θ = 100.8°</em>

<em></em>

Therefore, the angle between their paths is <em>100.8°</em>

4 0
3 years ago
Solve each inequality and graph the solution <br><br> 5+ x &lt;12
Ber [7]

Answer:

Inequality Form:

x<7

Interval Notation:

(−∞,7)

Step-by-step explanation:

plz give brainlyest

8 0
3 years ago
HELPPP<br><br> A. 9<br> B. 20<br> C. 16<br> D. 4
serious [3.7K]

Answer:

C 16

Step-by-step explanation:

Using ratios

3:12

12/3=4

4:x

4*4=16

x=16

4:16

hope this helps:)

6 0
3 years ago
HELP ME PLS! FOR THE FIRST &amp; SECOND ONE! 10 POINTS EACH!!!
swat32

Answer:

y=(0,-1)

x= 2/3

Graph: I went to use Math...way and plug up the equation

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Joy read 1/3 of the book in the morning and she reads some more at night by the end of the day she still had 2/5 of the book to
larisa [96]

Answer:

4/15

Step-by-step explanation:

Lets find a common denominator in order to find the total amount. There is a common denominator of 15 among 3 and 5. Therefore we will convert the fraction so they have the same denominator.

1/3 > 5/15

2/5 > 6/15

If Joy had read 5/15 of the book before reading at night, she already had the progress of being at 10/15 way through the book. At the end of the day, Joy had only 6/15 left of the book. To find the remainder, we subtract 10-6=4. This helps find the answer that Joy only read 4/15 of the book towards the end of the day.

4 0
2 years ago
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