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2 years ago

The answer to this, i don’t understand it

Mathematics

2 answers:

viktelen [127]2 years ago

7 0

Answer: the answer should be 9.22

Step-by-step explanation:

the formula is a^2 +b^=c ^

So 49 plus 36 equals 85

And the square root of 85 is 9.22

Akimi4 [234]2 years ago

6 0

Answer:
9.2

Step-by-step explanation:
Since it is a right triangle, you can use the Pythagorean theorem to find the third side which is the hypotenuse.

a^2 + b^2 = c^2
7^2 + 6^2 = c^2
49 + 36 = c^2
85 = c^2
9.219 = C
So, the answer rounded to the nearest tenth would be: 9.2

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The focal length F of a lens made by combining two lenses of focal length U and V is given I/F=I/U+I/V

jolli1 [7]

Answer:

a). $V=\frac{U.F}{U-F}$

b). V = 15 units

Step-by-step explanation:

Focal length F of a lens made by combining two lenses of different focal lengths U and V will be,

$\frac{1}{F}=\frac{1}{U}+\frac{1}{V}$

A). By solving the given formula,

$\frac{1}{V}=\frac{1}{F}-\frac{1}{U}$

$\frac{1}{V}=\frac{U-F}{U.F}$

$V=\frac{U.F}{U-F}$

B). If F = 6 and U = 10 then we have to find the value of V.

By substituting the given values in the formula,

$V=\frac{6\times 10}{10-6}$

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V = 15 units

Therefore, focal length (V) of the lens = 15 units

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4 years ago

20 POINTS!!!!

koban [17]

Answer:

The correct answer is d. (40, 60)

Step-by-step explanation:

To start using the linear combination method, you need a variable that will cancel out. To get this, we will multiply the second equation by -20 and then add together.

x + y = 100

-1.4x - y = -116

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-0.4x = -16

x = 40

Now that we have the value of x, we plug into one of the original equations to find y.

x + y = 100

40 + y = 100

y = 60

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SpyIntel [72]

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trapecia [35]

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