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JulijaS [17]
3 years ago
9

Умоляю помогите

Mathematics
1 answer:
Liula [17]3 years ago
6 0

ответы:

№1

а) 0

б) a+b

в) -3b-7

г) 2b-10

№2

а) -3x-2

б) -5y-8

в) 5x-27

г) -10y+24

№3

а) x=5

б) y=2

в) a=3

г) x=-1

№4

-63d-84

Пошаговое объяснение:

2x-(2x + y) + y

=2x-2x-y+y

=0

-\:a\:+\:\left(2a\:-\:b\right)\:+\:2b\:

=-a+2a-b+2b

=a-b+2b

=a+b

7-\left(b+14\right)-2b

=7-b-14-2b

=-3b-7

3b-\left(18+b\right)+8

=3b-18-b+8

=2b-10

2\left(3-x\right)-\left(8+x\right)

=6-2x-\left(8+x\right)

=6-2x-8-x

=-3x-2

-4\left(y+5\right)+\left(12-y\right)

=-4\left(y+5\right)+12-y

=-4y-20+12-y

=-5y-8

-\left(7-x\right)+4\left(x-5\right)

=-7+x+4\left(x-5\right)

=-7+x+4x-20

=5x-27

-9\left(y-4\right)-\left(12+y\right)

=-9y+36-\left(12+y\right)

=-9y+36-12-y

=-10y+24

3x-5x=-13+3

-2x=-13+3

-2x=-10

\frac{-2x}{-2}=\frac{-10}{-2}

x=5

-5y-17y=-50+6

-22y=-50+6

-22y=-44

\frac{-22y}{-22}=\frac{-44}{-22}

y=2

a-12a=-6-27

-11a=-6-27

-11a=-33

\frac{-11a}{-11}=\frac{-33}{-11}

a=3

-27x-33x=-12\left(-5\right)

-60x=-12\left(-5\right)

-60x=12\cdot \:5

-60x=60

\frac{-60x}{-60}=\frac{60}{-60}

x=-1

-12\left(7-2d\right)-9\left(7d-5\right)-3\left(15+8d\right)

=-84+24d-9\left(7d-5\right)-3\left(15+8d\right)

=-84+24d-63d+45-3\left(15+8d\right)

=-84+24d-63d+45-45-24d

=24d-63d-24d-84+45-45

=-63d-84+45-45

=-63d-84

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(90+x)/2 = 91.5
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Final score was a 93.
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3 years ago
La proporción de empleados de una empresa que usan su auto para ir al trabajo es 5:16. Si hay un total de 800 empleados, diga la
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Answer:

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Step-by-step explanation:

Tenemos la siguiente información de la pregunta;

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Por lo tanto, número total de automóviles esperado = proporción de empleados que vienen a trabajar con automóviles * número total de empleados

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(3x-5)/(x-5)&gt;=0 <br> How do I get the answers for this problem?
Diano4ka-milaya [45]
\frac{3x-5}{x-5} > 0 

First, note that x is undefined at 5. / x ≠ 5
Second, replace the inequality sign with an equal sign so that we can solve it like a normal equation. / Your problem should look like: \frac{3x-5}{x-5} = 0
Third, multiply both sides by x - 5. / Your problem should look like: 3x - 5 = 0
Forth, add 5 to both sides. / Your problem should look like: 3x = 5
Fifth, divide both sides by 3. / Your problem should look like: x = \frac{5}{3}
Sixth, from the values of x above, we have these 3 intervals to test: 
x < \frac{5}{3}
\frac{5}{3} < x < 5
x > 5
Seventh, pick a test point for each interval. 

1. For the interval x < \frac{5}{3} :
Let's pick x - 0. Then, \frac{3x0-5}{0-5} > 0
After simplifying, we get 1 > 0 which is true.
Keep this interval.

2. For the interval \frac{5}{3} < x < 5:
Let's pick x = 2. Then, \frac{3x2-5}{2-5} > 0
After simplifying, we get -0.3333 > 0, which is false.
Drop this interval.

3. For the interval x > 5:
Let's pick x = 6. Then, \frac{3x6-5}{6-5} > 0
After simplifying, we get 13 > 0, which is ture.
Keep this interval.
Eighth, therefore, x < \frac{5}{3} and x > 5

Answer: x < \frac{5}{3} and x > 5

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The 2nd and 5th terms of a gp are 1/18 and 4/243 respectively. Find
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The third term of the geometric progression will be 1 / 27 with common ratio 2 / 3.

We are given that:

2nd term of geometric progression = 1 / 18

5th term = 4 / 243

Now, we can also write it as:

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a r = 1 / 18

5th term = a r⁴

a r⁴ = 4 / 243

Now divide 5th term by 2nd term, we get that:

a r⁴ / a r = ( 4 / 243 ) / ( 1 / 18 )

r³ = 72 / 243

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r = 2 / 3

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a r² = a r × r

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3rd term = 1 / 27

Therefore, the third term of the geometric progression will be 1 / 27 with common ratio 2 / 3.

Learn more about geometric progression here:

brainly.com/question/24643676

#SPJ4

Your question was incomplete. Please refer the content below:

The 2nd and 5th term of a GP are 1/18 and 4/243 respectively find the 3rd term

6 0
1 year ago
Read 2 more answers
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