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2 years ago

HELP!!!!!!!!!!!!!!! IT'S TIMED!!!!!!!!!!!!!!!!

Mathematics

2 answers:

Dmitry_Shevchenko [17]2 years ago

8 0

Answer:

The answer is A

Step-by-step explanation:

There are two solutions.

Slope = 17

y - intercept = (0,1)

The two solutions is

(0,1) and (1,18)

So he is right

Olegator [25]2 years ago

4 0

Answer:

Step-by-step explanation:

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20 is 80% of what number?

Oxana [17]

It’s 25. Hope this helps ✌️

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2 years ago

Read 2 more answers

on the first day if the month, John counted his money and found he had $28.35. since then he has received an additional $17.26 f

barxatty [35]

Dude, this is simple addition. 28.35 + 17.26 = 45.61

He now has $45.61

8 0

2 years ago

What is the answer?<br> xy = 30<br> and x + y = 18

drek231 [11]

from second equation y = 18-x so:-

x(18 - x) = 30

x^2 - 18x + 30 = 0

x = 16.14, 1.86

when x = 16.14 y = 18-16.14 = 1.86

when x = 1.86, y = 16.14

so one variable = 16.14 and the other = 1.86 Answer

3 0

2 years ago

A beam of light from a monochromatic laser shines into a piece of glass. The glass has thickness L and index of refraction n=1.5

boyakko [2]

Additional information to complete the question:

How long does it take for a short pulse of light to travel from one end of the glass to the other?

Express your answer in terms of some or all of the variables f and L. Use the numeric value given for n in the introduction.

T = ___________ s

Answer:

$T = \frac{15}{f}$

Step-by-step explanation:

Given:

Thickness og glass = L

Index of refraction n=1.5

Frequency = f

$Wavelength = \frac{L}{10}$

λ(air) $= \frac{L}{10}$

λ(glass) = λ(air) / n

= $\frac{\frac{L}{10}}{1.5}$

= $\frac{L}{10} * \frac{1}{1.5}$

= $\frac{L}{15}$

V(glass) = fλ(glass)

$= f * \frac{L}{15}$

$T = \frac{L}{V_{glass}} = \frac{15}{f}$

7 0

3 years ago

Hey can you please help me posted picture of question

Flauer [41]

We can determine the correct graph by finding its roots

x² - 4x - 12 = 0

x² - 6x + 2x - 12 = 0

x(x-6) +2(x-6) = 0

(x+2)(x-6) = 0

This means the roots of the function are x=-2, and x=6 and the graph will cross x axis at these two points. From the given graphs, the graph B seems to cross these points.

So the answer to this question is option B

4 0

2 years ago