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2 years ago

How do I find the value of x so f(x)=7

Mathematics

1 answer:

irinina [24]2 years ago

5 0

Answer:

Set the equation you're given equal to 7 and isolate x.

Step-by-step explanation:

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Please help with 17, 19, and 21 using trigonometry. Thanks!

omeli [17]

I honestly don’t know. But the square in the bottom of the triangles indicate that it is a right triangle equaling 90 degrees. You can try using that along with other knowledge of right triangles you have. Could you possibly use Pythagorean theorem also?

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2 years ago

Find the value of x (sines and cosines)

Sav [38]

You would begin by choosing which trigonometric function to use.
In this case, you would use sine.

Sine is opposite over hypotenuse.
Opposite of the 35 degree angle is 18, and you want to find the hypotenuse which is x.

sin(35) = $\frac{18}{x}$ (multiply x to both sides)
x sin(35) = 18 (divide sin(35) to both sides)
x = 31.38204...

So, therefore x = 31.38. I don't know what decimal point you're supposed to round to, so I'm gonna guess the hundredths place. :)

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3 years ago

Cahit ve Elifin de aralarında bulunduğu 6 kişi yan yana

Law Incorporation [45]

Answer:

Step-by-step explanation:

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2 years ago

John, Johan, and Jonathan collect postage stamps. Johan and Jonathan have the same number of stamps. Two times Johan’s collectio

MrRissso [65]

The number of postage stamps in John’s collection is 27.

We have given that,

John, Johan, and Jonathan collect postage stamps. Johan and Jonathan have the same number of stamps.

<h3>What is an elimination method?</h3>

The elimination method is the process of eliminating one of the variables in the system of linear equations using the addition or subtraction methods in conjunction with the multiplication or division of coefficients of the variables.

Johan and Jonathan have the same number of stamps.

Let x be the Johan and Jonathan postal stamps.

Let y be the John postal stamps.

Two times Johan’s collection is eleven less than five times John’s collection.

2x = 5y - 11............(1)

Three times Jonathan’s collection is three less than seven times John’s collection.

3x = 7y - 3............(2)

Multiply equation 1 with 3

3(2x = 5y - 11)

⇒ 6x = 15y - 33.........(3)

Multiply equation 2 with 2

2(3x = 7y - 3)

⇒ 6x = 14y - 6.............(4)

Subtract equation 4 from equation 3

⇒ 6x - 6x = 15y - 33 - (14y - 6)

⇒ 0 = y - 27

⇒ y = 27

Hence, the number of postage stamps in John’s collection is 27.

Find more information about the elimination method here

brainly.com/question/13877817

#SPJ1

6 0

1 year ago

Find the value of x.<br> 8<br> 5<br> X + 20<br><br> I need help please

Deffense [45]

Answer:

$x=-\frac{68}{9}$

Step-by-step explanation:

$\frac{9}{14}=\frac{8}{x+20}\\$

$9(x+20)=8*14\\9x+180=112\\9x=-68\\x=-\frac{68}{9}\\$

5 0

2 years ago