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3 years ago

Find the value of x. 7 Х 3 Z X =√[?] Pls help explain !!

Mathematics

1 answer:

Alisiya [41]3 years ago

8 0

Answer:

Answer:

x = √70

Step-by-step explanation:

The triangles shown are all similar, so the corresponding sides are proportional.

hypotenuse/long side = x/7 = (7+3)/x

Cross-multiplying gives ...

x^2 = 7(10)

x = √70

_____

You will note that the value of x (the long side) is the geometric mean of the long segment and the whole hypotenuse.

A similar "geometric mean" relation holds for the short side:

BC = √(CD·CA)

There is yet another "geometric mean" relation that holds for the altitude:

BD = √(CD·AD)

Step-by-step explanation:

HOPE THIS HELPS

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At Lawson Middle School, Mr. Hernandez asked 90 randomly selected students, and 28 chose social studies as their favorite. He us

Umnica [9.8K]

Answer:

No, Mr. Hernandez’s sample is random, not biased, large enough compared to the population, but 28 is not 20% of 90.

Step-by-step explanation:

At Lawson Middle School, Mr. Hernandez asked 90 randomly selected students from each grade level for their favorite subject.

90 randomly selected students from each grade level for their favorite subject, and 28 chose social studies as their favorite.

so, the percent of students who love social studies is given by:

28/90 x 100=31.11%

He used this data to draw the inference that out of the 250 middle school students, about 20% prefer social studies.

No, Mr. Hernandez’s sample is random, not biased, large enough compared to the population, but 28 is not 20% of 90.

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3 years ago

Translate 5 times a number decreased by 2 into algebraic equation.

iragen [17]

Hello from MrBillDoesMath!

Answer: 5n - 2

where "n" is the number mentioned in the problem statement

Thank you,

MrB

3 0

3 years ago

Read 2 more answers

Four less than half a number is 17? Find the number

Savatey [412]

This would be 42 because 17+4•2=42

8 0

3 years ago

Match each set of vertices with the type of quadrilateral they form.

Serjik [45]

Only correct the first one.

Please, see the graph in the attached file.

1) a rectangle with    A(3,3), B(3,6),
noncongruent ←→ C(7,6), D(7,3)
adjacent sides
(in green)

2) a parallelogram
with A(2,0), B(3,2)
nonperpendicular ←→ C(6,3), D(5,1)
adjacent sides
(in blue)

3) a square ←→ A(3,3), B(2,5),
(in red) C(4,6), D(5,4)

4) a rhombus with       A(2,-2), B(3,0),
nonperpendicular    ←→ C(4,-2), D(3,-4)
adjacent sides
(in black)

5 0

4 years ago

True or false 1-5 and u don’t really need to explain them that much.

alexandr402 [8]

Answer:

Step-by-step explanation:

i wont explan

4 0

3 years ago