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Alex17521 [72]
3 years ago
12

Measure of angle CXF

Mathematics
1 answer:
AnnyKZ [126]3 years ago
5 0
50°

angle CXF and DXF are complementary which means they add to 90°

to 40° + x = 90
x = 50
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Jason inherited a piece of land from his great-uncle. Owners in the area claim that there is a 45% chance that the land has oil.
oksian1 [2.3K]

Answer:

0.36 = 36% probability that the land has oil and the test predicts it

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

P(B|A) = \frac{P(A \cap B)}{P(A)}

In which

P(B|A) is the probability of event B happening, given that A happened.

P(A \cap B) is the probability of both A and B happening.

P(A) is the probability of A happening.

45% chance that the land has oil.

This means that P(A) = 0.45

He buys a kit that claims to have an 80% accuracy rate of indicating oil in the soil.

This means that P(B|A) = 0.8

What is the probability that the land has oil and the test predicts it?

This is P(A \cap B). So

P(B|A) = \frac{P(A \cap B)}{P(A)}

P(B \cap A) = P(B|A)*P(A) = 0.8*0.45 = 0.36

0.36 = 36% probability that the land has oil and the test predicts it

5 0
3 years ago
351×5 estimate then record the product
Marysya12 [62]
2
351
x 5
-------
1,755

351 x 5 = 1,755
7 0
4 years ago
Read 2 more answers
In the linear equation y= 3/4x + 2 what does 2 represent?​
muminat

Answer: The y intercept.

Step-by-step explanation:

Using the form y = mx +b, m represents the slope and b is the y intercept. In the equation y = 3/4x + 2, the slope (m) = 3/4 and the y intercept (b) = 2

6 0
3 years ago
David records the number of visitors to the snake exhibit each day for 6 days .His data are shown in the table .If admission is
Ainat [17]

Answer:

\$1,176

Step-by-step explanation:

<u><em>The complete question in the attached figure</em></u>

we know that

To find out how much money the total snake exhibit earned in 6 days, add up the total number of visitors to the snake exhibit each day for 6 days and multiply that by the cost of admission per person

so

Find the total number of visitors for 6 days

30+25+44+12+25+32=168\ visitors

Multiply the total number of visitors by the admission cost per person

so

168(7)=\$1,176

7 0
3 years ago
Verify it as fast as you can​
melamori03 [73]

Answer:

(a+6)²

by identity (a+b)²=a²+2ab+b²

(a+6)²= a²+ 2×a×6 + 6²

= a²+ 12a + 36

(2a)²+5a = 4a²+5a

5 0
3 years ago
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