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4 years ago

I need help with number 17 please

Mathematics

1 answer:

emmainna [20.7K]4 years ago

7 0

Answer:

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Solve for x in degrees: sinx=cos(48) without a calculator

Licemer1 [7]

We are given with the mathematical expression <span>sinx=cos(48) and is asked in the porblem to determine the value of variable x. In this case, we solve first cos 48 which is equal to -0.64. to determine x, we use inverse sin, that is sin-1 (-0.64) = x; x= 42 degrees. x is equal also to 90-48 according to complementary postulate.</span>

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3 years ago

Find the value of x and y in each triangle

kykrilka [37]

Y = 8/cos60 = 16
x = sqr(16^2 + 8^2) = 8sqr(3) = 13.86 approx

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3 years ago

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In the country of United States of Heightlandia, the height measurements of ten-year-old children are approximately normally dis

Softa [21]

Answer:

$P(49.5$

$P(-1.192$

Step-by-step explanation:

We define X the random variable that represent the heights of a population for ten year old children, and for this case we know the distribution for X is given by:

$X \sim N(55.7,5.2)$

Where $\mu=55.7$ and $\sigma=5.2$

We want to find this probability:

$P(49.5$

We can use the z score formula to solve this problem given by:

$z=\frac{x-\mu}{\sigma}$

Using this formula we have:

$P(49.5$

And we can find this probability with this difference

$P(-1.192$

We can use tables for the normal standard distribution, excel or a calculator and we got this

$P(-1.192$

4 0

4 years ago

If each of three lines intersects a circle at two points, what is the greatest number of separate regions that can be formed?

jarptica [38.1K]

Answer:

Step-by-step explanation:

See the attached diagram with this answer.

If two straight lines cross a circle intersecting at two points then they can form a maximum of 4 regions within the circle, like the straight lines pq and rs form in circle c.

Now, another straight line mn is so placed that it forms the maximum number of separate regions in the circle.

Therefore, from the diagram, it is clear that there may be a maximum 7 separate regions formed by three straight lines intersecting the circle at two distinct points. (Answer)

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3 years ago

From 2000-2003, students were tested by the state in the four major subject areas of math, science, English and social studies.

jarptica [38.1K]

Social studies it slowly goes down. As for everything else it’s arranged around throughout the years

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3 years ago

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