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3 years ago

Multiply and reduce to lowest terms, 3 5/8× 4/5

Mathematics

1 answer:

Elanso [62]3 years ago

8 0

29/8 x 4/5

= 28/10

= 14/5

= 2 4/5

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ludmilkaskok [199]

Add all the numbers of the triangle and then divide them by the sides

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3 years ago

) Set up a double integral for calculating the flux of F=3xi+yj+zk through the part of the surface z=−5x−2y+2 above the triangle

Fynjy0 [20]

The surface (call it $S$ ) is a triangle with vertices at the points

$x=0,y=0\implies z=2\implies(0,0,2)$

$x=0,y=2\implies z=-2\implies(0,2,-2)$

$x=2,y=0\implies z=-8\implies(2,0,-8)$

Parameterize $S$ by

$\vec s(u,v)=(1-v)(2,0,-8)+v\bigg((1-u)(0,2,-2)+u(0,0,2)\bigg)=(2-2v,2v-2uv,-8+6v+4uv)$

with $0\le u\le1$ and $0\le v\le1$ . Take the normal vector to $S$ to be

$\vec s_v\times\vec s_u=(20v,8v,4v)$

Then the flux of $\vec F$ across $S$ is

$\displaystyle\iint_S\vec F(x,y,z)\cdot\mathrm d\vec S=\int_0^1\int_0^1\vec F(x(u,v),y(u,v),z(u,v))\cdot(\vec s_v\times\vec s_u)\,\mathrm du\,\mathrm dv$

$=\displaystyle\int_0^1\int_0^1(6-6v,2v-2uv,-8+6v+4uv)\cdot(20v,8v,4v)\,\mathrm du\,\mathrm dv$

$=\displaystyle8\int_0^1\int_0^1(11v-10v^2)\,\mathrm du\,\mathrm dv=\boxed{\frac{52}3}$

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3 years ago

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3 years ago

This question is confusing. Please help me!

velikii [3]

Answer:

x = 18

Step-by-step explanation:

Given:

a = 2x +3
b = 4x - 7

Finding x for which 3b = 5a:

3b = 5a

3(4x - 7) = 5(2x + 3)
12x - 21 = 10x + 15
12x - 10x = 15 + 21
2x = 36
x = 36/2
x = 18

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3 years ago

Read 2 more answers

During swim practice Brandi swam 6 butterfly stroke laps and 8 freestyle laps. What is the ratio of freestyle laps to total laps

densk [106]

Answer:

4:7

Edit: I just saw the multiple choice options, in this case the right answer is:

but they're both equal

Step-by-step explanation:

The ratio you are looking for is

freestyle laps : (freestyle + butterfly) laps

so:

8 : (6+8)

8:14

Divide by 2 to simplify

4:7

7 0

3 years ago