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VARVARA [1.3K]
2 years ago
13

Please I need the answers now​

Mathematics
2 answers:
Marina CMI [18]2 years ago
6 0

#a

\\ \tt\hookrightarrow 2(2x+1)=30

\\ \tt\hookrightarrow 4x+2=30

\\ \tt\hookrightarrow 4x=28

\\ \tt\hookrightarrow x=7

#b

\\ \tt\hookrightarrow 3(4x-3)=-12

\\ \tt\hookrightarrow 12x-9=-12

\\ \tt\hookrightarrow 12x=-3

\\ \tt\hookrightarrow x=-1/4

#c

\\ \tt\hookrightarrow 4(2x-7)=20

\\ \tt\hookrightarrow 2x-7=5

\\ \tt\hookrightarrow 2x=12

\\ \tt\hookrightarrow x=6

#d

\\ \tt\hookrightarrow 7(3x-4)=63

\\ \tt\hookrightarrow 3x-4=9

\\ \tt\hookrightarrow 3x=13

\\ \tt\hookrightarrow x=13/3

#e

\\ \tt\hookrightarrow 6(3x+3)=-72

\\ \tt\hookrightarrow 18x+18=-72

\\ \tt\hookrightarrow 18x=-90

\\ \tt\hookrightarrow x=-5

#f

\\ \tt\hookrightarrow -2(6x-3)=6

\\ \tt\hookrightarrow 6x-3=-3

\\ \tt\hookrightarrow 6x=0

\\ \tt\hookrightarrow x=0

KengaRu [80]2 years ago
5 0

The value of x is 7.

The value of x is -1/4.

The value of x is 7.

The value of x is 4 1/3.

The value of x is -5.

The value of x is 0.

<h3>What is the value of x in the equations?</h3>

2(2x + 1) = 30

The first step is to divide both sides of the equation by 2

2x + 1 = 15

Combine similar terms

2x = 15 - 1

2x = 14

x = 7

3(4x - 3) = -12

The first step is to divide both sides of the equation by 3

4X - 3 = -12 /3

4x - 3 = -4

Combine similar terms

4x = -4 + 3

4x = - 1

x = -1/4

4(2x - 7) = 20

The first step is to divide both sides of the equation by 4

2x - 7 = 5

Combine similar terms

2x = 5 + 7

2x = 12

x = 6

7(3x - 4) = 63

The first step is to divide both sides of the equation by 7

3x - 4 = 9

Combine similar terms

3x = 9 + 4

3x = 13

x = 4 1/3

6(3x + 3) = -72

The first step is to divide both sides of the equation by 6

3x + 3 = - 12

Combine similar terms

3x = -12 - 3

3x = -15

x = -5

-2(6x - 3) = 6

The first step is to divide both sides of the equation by -2

6x - 3 = -3

Combine similar terms

6x = -3 + 3

6x = 0

x = 0

To learn more about division, please check: brainly.com/question/194007

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A gold mine is projected to produce $52,000 during its first year of operation, $50,000 the second year, $48,000 the third year,
marshall27 [118]

Answer:

its present worth is nearest to 483,566

Option d) 483,566 is the correct answer

Step-by-step explanation:

Given that;

gold mine is projected to produce $52,000 during its first year

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produce $48,000 the third year

the mine is expected to produce for 20yrs; i.e n = 20

annual interest rate = 4% = 0.04%

now let P represent the present worth

we determine the present worth ;

Present worth ⇒ Cashflow(Uniform series present worth) - (2000)(uniform gradient present worth)

⇒Cashflow(P | A,i%,n) - (2000)(P | G,i%,n)

= 52000[ ((1+i)ⁿ - 1) / (i(1+i)ⁿ) ] - (2000)[ {((1+i)ⁿ - 1) / (i²(1+i)ⁿ))} - (n/i(1 + i)ⁿ) ]

= 52000[ ((1+0.04)²⁰ - 1) / (0.04(1+0.04)²⁰) ] - (2000)[ {((1+0.04)20 - 1) / ((0.04)²(1+0.04)²⁰))} - (20/0.04(1 + 0.04)²⁰) ]

= 52000[ ((1.04)²⁰ - 1) / (0.04(1.04)²⁰) ] - (2000)[ {((1.04)²⁰ - 1) / ((0.04)²(1.04)²⁰))} - (20/0.04(1.04)²⁰) ]

= 52000[ ((2.191123 - 1) / (0.04(2.191123) ] - (2000)[ {((2.191123 - 1) / ((0.0016)(2.191123))} - (20/0.04(2.191123) ]

= 52000(1.191123/0.08764) - (2000){( 1.191123/0.003506) - (20/0.87645)}

= 52000(13.59033) - (2000)(339.7582 - 228.1935)

= 52000(13.59033) - (2000)(111.5647)

= 706695.6 - 223129.4

= 483,566.2 ≈ 483,566

Therefore its present worth is nearest to 483,566

Option d) 483,566 is the correct answer

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Whatever you do to one side, you have to do to the other.
32=3.2c
We need c by itself, so we need to divide both sides by 3.2.
32/3.2=10
C=10
Let’s make sure c equals ten by putting in ten for c.
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so there are 12 men.

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