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Sphinxa [80]
3 years ago
13

Helllllllllllllllllpppppppppp please i have ZERO clue as to what I'm doing so please please please please please help me!!!!!

Mathematics
1 answer:
insens350 [35]3 years ago
6 0

Answer:

A. x = 68, y = 75

Step-by-step explanation:

So you see how those three angles all make a straight line? that's called complementary, where it all makes 180˚.

So, you know that...

(x-1)˚ + 40˚ + (y-2)˚ = 180˚

I'm not sure what that 74˚ is about, but what I would do is plug in the options until you get 180 degrees.

In this case, its the first option, A.

(68-1)˚ + 40˚ + (75-20)˚ = 180˚, which is true! so its A.

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Use the Commutative Property to write an expression equivalent to –5d + 1/2.
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Answer: 12-5d

because all you do is flip the expression

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3 years ago
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The times of the runners in a marathon are normally distributed, with a mean of 3 hours and 50 minutes and a standard deviation
serious [3.7K]

The probability that a randomly selected runner has a time less than or equal to 3 hours and 20 minutes is 0.16 or 16%.

<h3>What is normally distributed data?</h3>

Normally distributed data is the distribution of probability which is symmetric about the mean.

The mean of the data is the average value of the given data.

The standard deviation of the data is the half of the difference of the highest value and mean of the data set.

The times of the runners in a marathon are normally distributed, with

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  • Standard deviation of 30 minutes.

Refere the probabiliity table attached below. The probability of Z being inside the 1 Standard daviation of mean is 0.84.

The probability of runner selected with time less than or equal to 3 hours and 20 minutes,

P=1-0.84\\P=0.16

Thus, the probability that a randomly selected runner has a time less than or equal to 3 hours and 20 minutes is 0.16 or 16%.

Learn more about the normally distributed data here;

brainly.com/question/6587992

4 0
2 years ago
Find the interest earned: <br><br> $11,500 for 3.5 years at 7.25% annual simple interest
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Answer:

Future Value, using...

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14,418.13

 Annually Compounded Interest: $  

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Step-by-step explanation:

8 0
3 years ago
Solve for x in the diagram.
Kazeer [188]
It is a right triangle so,

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Hope this helps :)
7 0
3 years ago
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Brainliest If correct
mylen [45]
The answer would be 221
First we subtract 13 from both sides, then we get our answer
8 0
2 years ago
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