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2 years ago

Find the length of DF

Mathematics

1 answer:

ExtremeBDS [4]2 years ago

3 0

Answer:

your answer is 15/4. have fuun

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alekssr [168]

1/2x - 7 = 1 5/10

I'd go with c.

8 0

3 years ago

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arlik [135]

Given:

In a right angle triangle θ is an acute angle and $\tan\theta =\dfrac{3}{5}$ .

To find:

The value of $\cos \theta$ .

Solution:

In a right angle triangle,

$\tan \theta=\dfrac{Perpendicular}{Base}$

We have,

$\tan\theta =\dfrac{3}{5}$

It means the ratio of perpendicular to base is 3:5. Let 3x be the perpendicular and 5x be the base.

By using Pythagoras theorem,

$Hypotenuse=\sqrt{Perpendicular^2+base^2}$

$Hypotenuse=\sqrt{(3x)^2+(5x)^2}$

$Hypotenuse=\sqrt{9x^2+25x^2}$

$Hypotenuse=\sqrt{34x^2}$

$Hypotenuse=x\sqrt{34}$

In a right angle triangle,

$\cos \theta=\dfrac{Base}{Hypotenuse}$

$\cos \theta=\dfrac{5x}{x\sqrt{34}}$

$\cos \theta=\dfrac{5}{\sqrt{34}}$

Therefore, the value of $\cos \theta$ is $\dfrac{5}{\sqrt{34}}$ .

8 0

2 years ago

Change 2 hours and 36 mins to a mixed number

defon

You know you have two hours which will be the whole number. Then you take 36min and put it over 60min (total number of min in an hour) and you simplify by 6 to get 6/10 which can be simplified again to 3/5 so your final mixed number is
2 and 3/5 hours

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3 years ago

A pound is equal to 0.454 kilograms, how many kilograms does a 142-pound man weigh

levacccp [35]

Answer:

64.468

Step-by-step explanation:

5 0

2 years ago

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15 less than twice a number is less than or equal to -23. Into an equation

Dafna1 [17]