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swat32
3 years ago
9

7:5 is equivalent to...?​

Mathematics
1 answer:
Varvara68 [4.7K]3 years ago
4 0

Answer:

6:0

Step-by-step explanation:

Thank me later :)))))))))

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strojnjashka [21]

Answer:

I think B.

Step-by-step explanation:

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A traffic consultant wants to estimate the true proportion of cars on a certain street that have more than two occupants. She st
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Answer:

The data is a simple random sample from the population of interest.

Step-by-step explanation:

Conditions necessary to consider when constructing a confidence interval include using a large sample size, which should be greater Than or equal to 30 for n and a sample proportion of np ≤ 10. Importantly the sample must be a random sample drawn from the population, meaning that all the population of interest must have equal chances of being a part of the sample data. However, the scenariomabiveb, violates this condition as the sampling design is not completely randomized. Those who do not ply the route on that certain day have no Chaves of being part of the sample.

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2 years ago
A parabolic arch has a height of 25 feet and a span of 40 feet. How high is the arch 8 feet from each side of the center?
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Answer:

The correct option is;

21 ft

Step-by-step explanation:

The equation of the parabolic arc is as follows;

y = a(x - h)² + k

Where the height is 25 ft and the span is 40 ft, the coordinates of the vertex (h, k) is then (20, 25)

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y = a(x - 20)² + 25

Whereby the parabola starts from the origin (0, 0), we have;

0 = a(0 - 20)² + 25

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The equation of the parabola is therefore;

y = (-\frac{1}{16})(x-20)^2 + 25

To find the height 8 ft from the center, where the center is at x = 20 we have 8 ft from center = x = 20 - 8 = 12 or x = 20 + 8 = 28

Therefore, plugging the value of x = 12 or 28 in the equation for the parabola gives;

y = (-\frac{1}{16})(12-20)^2 + 25 = (-\frac{1}{16})(-8)^2 + 25 = 21 \ ft.

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3 years ago
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Answer:

(-4.5, 4.25)                The first one.

Step-by-step explanation:

Plug in -4.5 in for x and 4.25 for y in BOTH problems.  When you plug them in and they both work out for BOTH problems then its the answer.

7 0
2 years ago
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