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3 years ago

I need the answer and work

Mathematics

1 answer:

ad-work [718]3 years ago

7 0

A) 2x +3

Plug in the x

2(4.1) + 3

8.2+ 3= 11.2

A is 11.2

B) 16-5y

Plug in the y

16 - 5(2.3)

16- 11.5= 4.5

B is 4.5

C) x+y

Plug in x and y

4.1 + 2.3= 6.4

C is 6.4

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WILL UPVOTE

amm1812

X=6 you need to multiply by 2

7 0

4 years ago

Evaluate the surface integral ∫sf⋅ ds where f=⟨2x,−3z,3y⟩ and s is the part of the sphere x2 y2 z2=16 in the first octant, with

skad [1K]

Parameterize S by the vector function

$\vec s(u,v) = \left\langle 4 \cos(u) \sin(v), 4 \sin(u) \sin(v), 4 \cos(v) \right\rangle$

with 0 ≤ u ≤ π/2 and 0 ≤ v ≤ π/2.

Compute the outward-pointing normal vector to S :

$\vec n = \dfrac{\partial\vec s}{\partial v} \times \dfrac{\partial \vec s}{\partial u} = \left\langle 16 \cos(u) \sin^2(v), 16 \sin(u) \sin^2(v), 16 \cos(v) \sin(v) \right\rangle$

The integral of the field over S is then

$\displaystyle \iint_S \vec f \cdot d\vec s = \int_0^{\frac\pi2} \int_0^{\frac\pi2} \vec f(\vec s) \cdot \vec n \, du \, dv$

$\displaystyle = \int_0^{\frac\pi2} \int_0^{\frac\pi2} \left\langle 8 \cos(u) \sin(v), -12 \cos(v), 12 \sin(u) \sin(v) \right\rangle \cdot \vec n \, du \, dv$

$\displaystyle = 128 \int_0^{\frac\pi2} \int_0^{\frac\pi2} \cos^2(u) \sin^3(v) \, du \, dv = \boxed{\frac{64\pi}3}$

8 0

2 years ago

The slope of two lines are 5/6 and 2/p. determine the value of p that will make the lines

Anni [7]

Parallel: the lines have = slopes. We thus need 5/6 to equal 2/p. then 5p must equal 12, and p = 12/5. (answer)

Check: Is 5/6 = 2 / (12/5)? YES

Perp.: The lines have slopes that are negative reciprocals of one another.

Then -6/5 = 2/p, or

-6 2
---- = ----
5 p Thus, -6p = 10, and p = -5/3 (answer)

7 0

3 years ago

Read 2 more answers

Can someone please answer this question please answer it correctly and please show work please help me I need it

andrezito [222]

Answer:

A. Kayla

Step-by-step explanation:

To find the difference between the two numbers we will do:

7°C - (-5°C)

Subtracting a negative number is the same as simply adding, so we can rewrite the equation as:

7°C + 5°C = 12°C

6 0

3 years ago

Read 2 more answers

Plz help............................

Natasha2012 [34]

1.) Factor 9u^2-12u
$\frac{3u(3u-4)}{3u}$

2.) Cancel any common factors (in bold will be the terms eliminated)
$\frac{3u(3u-4)}{3u}$

Final answer is: 3u-4

Therefore, the answer is C. 3u-4

5 0

3 years ago