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3 years ago

Is this communities property yes or no 9+8 8+9

Mathematics

1 answer:

lorasvet [3.4K]3 years ago

5 0

Yes it is just like a+b = b+a

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If sin θ=.55 what is the value of cos θ and explain why

MatroZZZ [7]

Answer:

$cos(\theta)=(+/-)0.84$

Step-by-step explanation:

we know that

$sin^2(\theta)+cos^2(\theta)=1$ ----> by trigonometric identity

we have

$sin(\theta)=0.55$

substitute

$(0.55)^2+cos^2(\theta)=1$

$cos^2(\theta)=1-(0.55)^2$

$cos^2(\theta)=0.6975$

$cos(\theta)=(+/-)\sqrt{0.6975}$

$cos(\theta)=(+/-)0.84$

Remember that

If the sine of angle theta is positive, then the angle theta lie on the I Quadrant or II Quadrant

therefore

If the angle theta is on the I Quadrant the cosine will be positive

If the angle theta is on the II Quadrant the cosine will be negative

3 0

3 years ago

Find the exact length of the third side.<br> 7.<br> 3

Lelechka [254]

Answer:

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

A large rectangular movie screen in an IMAX theater has an area of 8,364 square feet. Find the dimensions of the screen if it is

jeyben [28]

Answer:

The dimensions of the screen are

Length:102 feet

Width: 82 feet

Step-by-step explanation:

we know that

The area of the rectangle (movie screen) is equal to

$A=LW$

where

L is the length

W is the width

we have

$A=8,364\ ft^2$

$8,364=LW$ ----> equation A

The screen is 20 feet longer than it is wide.

$L=W+20$ ---> equation B

substitute equation B in equation A

$8,364=(W+20)W$

solve for W

$8,364=W^2+20W\\W^2+20W-8,364=0$

solve the quadratic equation by graphing

the solution is W=82 ft

see the attached figure

Find the value of L

$L=82+20=102\ ft$

therefore

The dimensions of the screen are

Length:102 feet

Width: 82 feet

7 0

4 years ago

la siguinete tabla mustran la correspondencia entre dos variables. Determina si es funcion o relacion

Vaselesa [24]

Answer:

where's the table. on és la taula?

Step-by-step explanation:

6 0

3 years ago

Which do the following equations represent? -4x-5y=-4 and 10x-8y=-1

kicyunya [14]

Parallel have same slope
Perpendicular have opposite reciprocal slopes. Ex. 2/3 is slope of one line so the perpendicular line would have slope of -3/2.

Find slopes of these lines.

-4x-5y=-4
-4x+4 =5y
Divide by 5

Y= -4x/5 +4/5

Second line: 10x-8y=-1

10x+1=8y
Divide by 8

10x/8 +1/8 =y

Y= 5x/4 +1/8

So if you look at slope of line 1= -4/5 and line 2 it’s 5/4 so these both are perpendicular.

5 0

3 years ago