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OleMash [197]
3 years ago
6

A high school math class has 28 students: 18 seniors and 10 juniors. What is the probability that four randomly selected student

s will be seniors?
Mathematics
1 answer:
aniked [119]3 years ago
7 0

Answer:

18/28, or percentage wise, approximately 64.2%

Step-by-step explanation:

Take the seniors and divide it by the total # of students, and you got your probability!

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Which descriptions from the list below accurately describe the relationship
Sphinxa [80]

Answer:

A) Same shape

C) Similar

Step-by-step explanation:

The figure is missing: find it in attachment.

Here we want to compare the two triangles: Let's analyze each statement.

A) Same shape --> TRUE

In fact, we see that the 3 angles of the two triangles are the same: therefore, the two triangles have same shape.

B) Congruent --> FALSE

Two triangles are said to be congruent if they have same sizes and same angles: here we see that they do not have the same sizes, so they are not congruent.

C) Similar --> TRUE

Two triangles are said to be similar if the proportions between their sides are the same.

For the triangles in the figure, we see that this is valid. In fact, the ratio of the 3 sides for the triangle on the left is 10:8:6, while the ratio for the triangle on the right is 20:16:12, which can be reduced to 10:8:6: therefore, the same ratio.

D) Same size --> FALSE

As we see, the two triangles do not have the same size.

7 0
4 years ago
a piece of wood used for construction is 2 inches by 4 inches by 24 inches. what is the surface area of the wood
FrozenT [24]
2*2*4+2*2*24+2*4*24
16+96+192=304

304 is the answer
8 0
3 years ago
Yis inversely proportional to the square of x.
PtichkaEL [24]

Answer:

(a) y = \frac{4}{x^2}

(b) x = \frac{2}{5}

Step-by-step explanation:

Given

Variation: Inverse proportional.

This is represented as:

y\ \alpha\ \frac{1}{x^2}

See attachment for table

Solving (a):

First convert variation to equation

y = k\frac{1}{x^2}

From the table:

(x,y) = (1,4)

So, we have:

4 = k * \frac{1}{1^2}

4 = k * \frac{1}{1}

4 = k * 1

4 = k

k = 4

Substitute 4 for k in y = k\frac{1}{x^2}

y = 4 * \frac{1}{x^2}

y = \frac{4}{x^2}

Solving (b): x when y = 25.

Substitute 25 for y in y = \frac{4}{x^2}

25 = \frac{4}{x^2}

Cross Multiply

25 * x^2 = 4

Divide through by 25

x^2 = \frac{4}{25}

Take positive square roots of both sides

x = \sqrt{\frac{4}{25}

x = \frac{2}{5}

4 0
3 years ago
What is BD?<br> C<br> X + 5<br> B<br> х<br> 12<br> 27<br> А<br> BD =
VARVARA [1.3K]

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5 0
3 years ago
SOMEONE PLEASE HELPP MEEE
Oxana [17]

Answer:I need help to

Step-by-step explanation:

8 0
4 years ago
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