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3 years ago

F(a)=a^2=4a;find f(-2)

Mathematics

1 answer:

Tanzania [10]3 years ago

5 0

Answer:

I HOPE I HELPPPPP BRAINLYY PLZZ :))))

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What are all the terms in the expression 4 m n + m + 5

Diano4ka-milaya [45]

4mn + m + 5

Terms: 4mn, m, 5

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3 years ago

WILLL GIVE BRANLIEST PLSSSSSSSSSSSSSSSSSSSS

maks197457 [2]

Answer:

100°

Step-by-step explanation:

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2 years ago

Whats the surface area of a cylinder with height of 12in.and the radius is 4in

emmainna [20.7K]

Answer:

401.92 in²

Step-by-step explanation:

S.A. = 2πr²+2πrh

S.A. = 2π4²+2π4·12

S.A. = 100.48 + 301.44

S.A. = 401.92 in²

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3 years ago

Find y as a function of x if y"' + 9y' = 0, y(0) = 6, y'(0) = 9, y"(0) = 18. y(x) =

Andreas93 [3]

Answer:

y(x) = 8 - 2cos 3x + 3sin 3x

Step-by-step explanation:

Given the equation:

y''' + 9y' = 0

The characteristic equation :

⇒r³ + 9r =0

Solving for r, we get r = 0 and r = ± 3i

The general equation for such equation is :

y = C₁ + C₂cos 3x + C₃sin 3x

Given:

y(0) = 6

Thus, Applying in the above equation, we get

6 = C₁ + C₂ .......................................................1

Differentiating y , we get:

y' = -3C₂sin 3x + 3C₃cos 3x

Given:

y'(0) = 9

Thus, Applying in the above equation, we get

9 = 3C₃

or,

C₃ = 3

Differentiating y' , we get:

y'' = -9C₂cos 3x - 9C₃sin 3x

Given:

y''(0) = 18

Thus, Applying in the above equation, we get

18 = -9C₂

or,

C₂ = -2

Applying in equation 1 , we get:

C₁ = 8

Thus,

y(x) = 8 - 2cos 3x + 3sin 3x

4 0

3 years ago

Find the missing side x

bezimeni [28]

Answer:

$\sqrt{968}$

Step-by-step explanation:

Since this is a right triangle, we are able to use pythagorean theorem, a^2+b^2=c^2. In this case x would be the "c", so 22^2+22^2=x^2. Isolate the variable and solve for x. 484+484=x^2

968=x^2

$\sqrt{968\\}$ =x

6 0

3 years ago