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2 years ago

Which expression below is equivalent to the one below? 3 (2x+5)-(-5x+4)

Mathematics

2 answers:

Vinil7 [7]2 years ago

8 0

Answer:

D) 11x + 9

Step-by-step explanation:

3(2x + 5) - (-5x + 4) = (6x + 15) - (-5x + 4) = 6x + 15 + 5x - 4

add like terms:

(6x + 5x) + (15 - 4) = 11x + 9

Anna11 [10]2 years ago

5 0

3(2x+5)-(-5×+4)

3(2×+5) - (-5×+4)

3× (6×) - (1)

6×+1

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Planet Mass (in grams) Jupiter 1.989 ∙ 10^30

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3 years ago

Write each percent as a decimal a 80% B 3% C 12.5% D 125%

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Answer:

a .8

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c .125

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Step-by-step explanation:

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2 years ago

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Step-by-step explanation:

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3 years ago

37 points! The square root of 83 can be plotted on the number line below.

Nikitich [7]

Answer:

9.1 is the nearest tenth

9.11 to the nearest hundredth

just slightly to the right of 9.1

Step-by-step explanation:

sqrt(83)

sqrt(81) = 9

So we know that it is slightly greater than 9

9.1*9.1 =81.81

9.2*9.2=84.64

9.1 is closer

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9.12 * 9.12 =83.1744

9.11 is closer

7 0

3 years ago

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In a flight of 600 km, the speed of the aircraft was slowed down due to bad weather. The average speed of the trip was decreased

UkoKoshka [18]

The average speed would be 600 km/hr.

Step-by-step explanation:

Let the original speed be 'x'

Let the decreased speed be 'x-200'

Distance = 600 km

Time increased by 30 minutes

According to question, it becomes,

$\dfrac{600}{x-200}-\dfrac{600}{x}=\dfrac{30}{60}\\\\\dfrac{x-(x-200)}{x^2-200x}=\dfrac{1}{2\times 600}\\\\\dfrac{200}{x^2-200x}=\dfrac{1}{1200}\\\\240000=x^2-200x\\\\x^2-200x-240000=0\\\\x=600,-400$

So, The average speed would be 600 km/hr.

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3 years ago