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Orlov [11]
3 years ago
15

PLZ PLZ PLZ SOMEONE HELP ME!!!

Mathematics
1 answer:
sergiy2304 [10]3 years ago
8 0
Step 4 is wrong. the answer is 1/8, she changed sign on 2^(-3) to 2^(3) without moving it to numerator
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What is the value of 2x+3 if x=1
Ostrovityanka [42]

Answer:

5

Step-by-step explanation:

=> 2x+3

<em>For x = 1</em>

=> 2(1) + 3

=> 2+3

=> 5

5 0
3 years ago
Read 2 more answers
The points (5, r) and (10, 13) lie on a line with slope 3. Find the missing coordinate r.
MatroZZZ [7]

Answer:

the answer is x = 5

Step-by-step explanation:

its that easy but i dont want to waste ur time explaining lol

4 0
3 years ago
Solve 4x - 7 = 2x + 3<br> Show all work
bearhunter [10]

Answer:

x = 5

Step-by-step explanation:

Step 1:

4x - 7 = 2x + 3           Equation

Step 2:

2x - 7 = 3           Subtract 2x on both sides

Step 3:

2x = 10         Add 7 on both sides

Step 4:

x = 10 ÷ 2        Divide

Answer:

x = 5

Hope This Helps :)

5 0
3 years ago
Read 2 more answers
The causes of land pollutions are​
Sergeu [11.5K]

Answer:

Step-by-step explanation:

Pollution can be defined as the introduction of harmful substances (man-made or natural) into the environment.

There are four major types of pollution:

1. Land pollution

2. Water pollution

3. Air pollution

4. Noise pollution

Land pollution refers to the gradual disintegration of the earth surface.

Causes of land pollution

1. Deforestation: The continuous cutting down of trees in the forest.

2. Erosion: The gradual disintegration of soil caused by the action of water.

3. Harmful agricultural practices such as bush burning, introducing toxic substances such as pesticides into the soil

4. Increased industrial waste due to increase in the number of industries

5. Mining of natural resources from the earth surface

6. Construction of bridges, railways and roads

5 0
3 years ago
∫∫(x+y)dxdy ,d là miền giới hạn bởi x²+y²=1
igor_vitrenko [27]

It looks like you want to compute the double integral

\displaystyle \iint_D (x+y) \,\mathrm dx\,\mathrm dy

over the region <em>D</em> with the unit circle <em>x</em> ² + <em>y</em> ² = 1 as its boundary.

Convert to polar coordinates, in which <em>D</em> is given by the set

<em>D</em> = {(<em>r</em>, <em>θ</em>) : 0 ≤ <em>r</em> ≤ 1 and 0 ≤ <em>θ</em> ≤ 2<em>π</em>}

and

<em>x</em> = <em>r</em> cos(<em>θ</em>)

<em>y</em> = <em>r</em> sin(<em>θ</em>)

d<em>x</em> d<em>y</em> = <em>r</em> d<em>r</em> d<em>θ</em>

Then the integral is

\displaystyle \iint_D (x+y)\,\mathrm dx\,\mathrm dy = \iint_D r^2(\cos(\theta)+\sin(\theta))\,\mathrm dr\,\mathrm d\theta \\\\ = \int_0^{2\pi} \int_0^1 r^2(\cos(\theta)+\sin(\theta))\,\mathrm dr\,\mathrm d\theta \\\\ = \underbrace{\left( \int_0^{2\pi}(\cos(\theta)+\sin(\theta))\,\mathrm d\theta \right)}_{\int = 0} \left( \int_0^1 r^2\,\mathrm dr \right) = \boxed{0}

3 0
3 years ago
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