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MariettaO [177]
2 years ago
13

Can someone help me with this

Mathematics
1 answer:
Marizza181 [45]2 years ago
7 0

Answer:

ree

Step-by-step explanation:

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Ignacio is curious about the average age of cars in the commuter lot at Mis large university. He takes a random
spin [16.1K]

Answer:

Between 12.614 years and 16.386 years

Step-by-step explanation:

Given that:

Mean age (μ) = 14.5 years, standard deviation (σ) = 4.6 years, number o sample (n) and the confidence interval (c) = 90% = 0,9

α = 1 -c = 1 -0.9 = 0.1

\frac{\alpha }{2}  = \frac{0.1}{2} = 0.05

The z score of \alpha /2 is the same as the z score of 0.45 (0.5 - 0.05). This can be gotten from the probability distribution table. Therefore:

z_{0.05}=1.64

The margin of error (e) = z_{0.05}\frac{\sigma}{\sqrt{n} } = 1.64*\frac{4.6}{\sqrt{16} }=1.886

The interval = μ ± e = 14.5 ± 1.886 = (12.614 ,16.386)

4 0
3 years ago
Which one of the following English phrases translates to this algebraic expression? 3n - 15
zhenek [66]

Answer:

C

Step-by-step explanation:

It is stating that it is 15 less(-15) than the Product of 3 and some number(3n)

5 0
3 years ago
If KM = NO and KM = PQ, then NO = PQ.
charle [14.2K]
The property shown is a B: substitution property, this is when you you the know that X=Y so X can be substituted in any equation with Y and Y can be substituted in any equation with X. hope this helps 
8 0
2 years ago
Solve the equation, 4 - (x + 1) = 6.<br><br> x = -3<br> x = 3<br> x = -9<br> x = 9
Vinvika [58]

Answer:

Step-by-step explanation:

The negative in front of the parenthesis changes the signs of the numbers and variables inside the parenthesis. We can rewrite as

4 - x - 1 = 6 and

3 - x = 6 so

- x = 3 and

x = -3

3 0
3 years ago
Read 2 more answers
Steve kicks a football into the air. The path that a ball takes can be described by the equation h=20t - 5t squared where h is t
FinnZ [79.3K]
Since h represents the height of the ball at any given time, t, let h = 25, such that the ball will be 25m high at t.

Now, we have 25 = 20t - 5t²
5t² - 20t + 25 = 0
t² - 4t + 5 = 0

\frac{4 +- \sqrt{16 - 20}}{2}

Since the discriminant is less than zero, there are no solutions.
Hence, the ball will never be 25m high.

4 0
2 years ago
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