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4 years ago

The point (3, -4) is on the terminal side of an angle 0 . What is cos 0 ?

1 answer:

5 0

Draw it
cos=oposite side/hypothuse

oposite side=y=-4
hypotonuse=distance from (0,0) to (3,-4)
which is $D=\sqrt{3^2+(-4)^2}=\sqrt{9+16}=\sqrt{25}=5$

so it would be -4/5

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zavuch27 [327]

Answer:

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3 years ago

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What is the inverse of f(x)=3x+6 ?

scZoUnD [109]

Answer:

$\boxed{\sf \ \ f^{-1}(x)=\dfrac{x-6}{3} \ \ }$

Step-by-step explanation:

hello,

we can write

$fof^{-1}(x)=x \ and \ fof^{-1}(x)=f(f^{-1}(x))=3f^{-1}(x)+6 \ so\\3f^{-1}(x)+6=x \ \ subtract \ 6\\3f^{-1}(x)=x-6 \ \ divide \ \ by \ \ 3\\ f^{-1}(x)=\dfrac{x-6}{3}$

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3 years ago

Alex, Bruno, and Charles each add the lengths of two sides of the same triangle correctly. They get 27 cm, 35 cm, 32 cm, respect

Vera_Pavlovna [14]

Answer:

47 cm.

Step-by-step explanation:

Alex, Bruno, and Charles each add the lengths of two sides of the same triangle correctly.

They get 27 cm, 35 cm, and 32 cm, respectively. Find the perimeter of the triangle, in cm

find:

Find the perimeter of the triangle, in cm. What is the most efficient strategy you can find to solve this problem?

<u>solution:</u>

27, 35, and 32 are each the sum of a different pair of sides of the triangle

Then 27 + 35 + 32 is the sum of all three sides, each counted twice.

Thus, 27 + 35 + 32 = 94 is twice the perimeter

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the perimeter of the triangle is 94/2 = 47 cm.

6 0

3 years ago

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Orlando bought a new couch for 1,968 , using the furniture store's finance plan. He will pay 164 a month for 12 months. Which eq

Savatey [412]

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3 years ago

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scZoUnD [109]

Answer:

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They are buying 5 of each thing, so multiply it by 5.

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When you solve the equation, you get 9.9. Convert that to money, and you have $9.90

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3 years ago