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weeeeeb [17]
4 years ago
11

The number 2400 is first increased by 30%.The value obtained is next decreased by 20%.Find the final number

Mathematics
1 answer:
kvasek [131]4 years ago
3 0

<em>2400 is increased by 30%.</em>

so,

2400 + (30/100 * 2400)

2400 + (30 * 24)

2400 + 720

3120

<em>this number is decreased by 20%.</em>

so,

3120 - (20/100 * 3120)

3120 - (2 * 312)

3120 - 624

2496

therefore, the final number will be 2496.

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victus00 [196]

Answer:

D. 18

Step-by-step explanation:

  • multiply both sides by 9/2, the reciprocal of 2/9.

4×(9/2)=x

  • express 4×(9/2) as a single fraction.

4×9/2=x

  • multiply 4 and 9 to get 36.

36/2=x

  • divide 36 by 2 to get 18.

18=x

  • swap sides so that all variable terms are on the left hand side.

x=18

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Monica [59]

Answer:

-37

Step-by-step explanation:

Simplifying

74 + 2x = 0

Solving

74 + 2x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-74' to each side of the equation.

74 + -74 + 2x = 0 + -74

Combine like terms: 74 + -74 = 0

0 + 2x = 0 + -74

2x = 0 + -74

Combine like terms: 0 + -74 = -74

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scZoUnD [109]

Answer:

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Step-by-step explanation:

x^2 + 18x = 9x

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x^2 + 18x-9x = 9x-9x

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Factor x from the left hand side

x(x+9) =0

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