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3 years ago

Please someone answer asap

Mathematics

1 answer:

Rus_ich [418]3 years ago

8 0

Answer:

(-inf,6]

Step-by-step explanation:

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9s + 29<br> what is the value of s

olga2289 [7]

Answer:

wheres the rest of the problem?

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4 years ago

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Ten subtracted from the quotient if a number and 7 is less than -6

e-lub [12.9K]

Answer:

10-(x/7)<-6

Step-by-step explanation:

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3 years ago

Find the surface area of the part of the circular paraboloid z=x^2+y^2 that lies inside the cylinder X^2+y^2=1

hichkok12 [17]

Answer:

$\mathbf{\dfrac{\pi}{6}[5 \sqrt{5}-1]}$

Step-by-step explanation:

Given that:

The surface area (S.A) $z = x^2 +y^2$

Hence the S.A is of form z = f(x,y)

Then the S.A can be represented with the equation

$A(S) = \iint _D \sqrt{1+ (\dfrac{\partial z}{\partial x})^2+ (\dfrac{\partial z}{\partial y})^2} \ dA$

where :

D = cylinder $x^2 +y^2 =1$

In polar co-ordinates:

D = {(r, θ): 0≤ r ≤ 1, 0 ≤ θ ≤ 2π)

Similarly, $\dfrac{\partial z}{\partial x} = 2x$ and $\dfrac{\partial z}{\partial y} = 2y$

Therefore;

$S.A = \iint_D \sqrt{1+4x^2+4y^2} \ dA$

$= \iint_D \sqrt{1+4(x^2+y^2)} \ dA$

$= \int^{2 \pi}_{0} \int^{1}_{0} \sqrt{1+4r^2} \ r \ dr \d \theta$

$= [\theta]^{2 \pi}_{0} \dfrac{1}{8}\times \dfrac{2}{3}\begin {bmatrix} (1+4r^2)^{\dfrac{3}{2}}\end {bmatrix}^1_0$

$= 2 \pi \times \dfrac{1}{12}[5^{\dfrac{3}{2}} - 1]$

$\mathbf{=\dfrac{\pi}{6}[5 \sqrt{5}-1]}$

6 0

3 years ago

Lynnette went to the coffee shop to buy coffee beans. She purchased 2.5 pounds of her favorite blend. This blend cost $8.50 per

ElenaW [278]

Answer: $21.25

Step-by-step explanation:

Given

Lynnette purchased 2.5 Pounds of blent, which costs $8.50 per pound

total cost is the Product of the amount of blend and rate of coffee blend

$\Rightarrow C=2.5\times 8.50=\$21.25$

So, coffee beans cost $21.25

4 0

3 years ago

HELP ME WITH THIS QUESTION PLEASE

Shkiper50 [21]

Answer:

Step-by-step explanation:

1. 7x + 4

2. 3x - 2

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3 years ago