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Dmitriy789 [7]
3 years ago
13

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

Mathematics
1 answer:
Vlad1618 [11]3 years ago
6 0

Answer:

Answer:

 x = √70

Step-by-step explanation:

The triangles shown are all similar, so 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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Evaluate the function: f(-x)=x^2+9x-6
astraxan [27]

Answer:

f(-x) = x² - 9x - 6

General Formulas and Concepts:
<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

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<u>Algebra I</u>

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Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify.</em>

f(x) = x² + 9x - 6

<u>Step 2: Evaluate</u>

  1. Substitute in <em>x</em> [Function f(x)]:                                                                       f(-x) = (-x)² + 9(-x) - 6
  2. [Order of Operations] Simplify:                                                                    f(-x) = x² - 9x - 6
4 0
2 years ago
Marshas cat weighs 15.41 her cat only weighs 4.79 pounds. about how much more does her cat weigh?​
rewona [7]

Answer:

10.31

Step-by-step explanation:

15.41-4.79=10.31

8 0
4 years ago
What is the precision of your measurement of line AB
vodomira [7]
Find the difference (subtract) between the accepted value and the experimental value, then divide by the accepted value. To determine if a value is precise find the average of your data, then subtract each measurement from it.
4 0
4 years ago
The population of a city has been increasing by 2% annually. In 2000, the population was 315,000. Predict the population of the
Minchanka [31]

Answer:

The population of the city in 2020 is 3,839,832

Step-by-step explanation:

Given:

Population at 2000 =  315,000

Rate at which the population increases = 2%

To Find:

The Population in the city after 2020 = ?

Solution:

The population in the city after 2020 can be found by using Exponential growth function.

Exponential growth occurs when a quantity increases by the same factor

Exponential growth function is y = a(1 + r)^t

Where

y is the final amount

a is the initial amount

r is the rate of  increase

t is the time period.

Now substituting the values ,

In 2020 i.e., after 10 years

y = 315000(1 + 2 \%)^{10}

y = 315000(1 + \frac{2}{100})^{10}

y = 315000(1 + 0.02)^{10}

y = 315000(1.02)^{10}

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3 years ago
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Step-by-step explanation:

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