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3 years ago

2[x-3]+1=7. Help me pls

Mathematics

2 answers:

Mandarinka [93]3 years ago

8 0

Answer:

$2(x - 3) + 1 = 7 \\ 2(x - 3) = 7 - 1 \\ 2x - 2 \times 3 = 6 \\ 2x - 6 = 6 \\ 2x = 6 + 6 \\ 2x = 12 \\ x = \frac{12}{2} = 6 \\ x = 6 \\ thank \: you$

olasank [31]3 years ago

3 0

Answer:

here,

2[x-3]+1=7

or, 2x-6=7-1

or,2x=6+6

or,x=12/2

hence the value of x =6

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Need some help with trigonometry. Last question answered by bots.

Montano1993 [528]

Answer:

See below for answers and explanations

Step-by-step explanation:

First, find the missing side using the Pythagorean Theorem:

c²=a²+b²

65²=a²+16²

4225=a²+256

3969=a²

63=a

Therefore:

sinα = opposite/hypotenuse = 63/65

cosα = adjacent/hypotenuse = 16/65

tanα = opposite/adjacent = 63/16

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3 years ago

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Semenov [28]

32 3/10, 71 1/10, 73 9/10, 28 3/10, and 60

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3 years ago

On a bicycle, Esmeralda rides for 2 hours and is 12 miles from her house. After riding for 9 hours, she is 47 miles away.

In-s [12.5K]

For this case what we must do is find the speed of Esmeralda.

For this, we look for the rate of change of the function

We have then:

$AVR=\frac{y2-y1}{x2-x1}$

Substituting values:

$AVR=\frac{47-12}{9-2}$

Rewriting:

$AVR=\frac{35}{7}$

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3 years ago

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Elanso [62]

Answer : D) {4R, 4B, 4C, 5R, 5B, 5C, 6R, 6B, 6C}

Step-to step explanation:

Given : Choices for phone models= 4, 5, and 6 ( 3 choices)

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Number of different refurbished phone can be made = ( Choices for phone models) x (Choices for protective case)

= 3 x 3 = 9 choices

Therefore , the number of different choices he has = 9

Since only option D has all 9 choices (each phone models pair with each kin of protective case)

Hence, all the different choices he has = {4R, 4B, 4C, 5R, 5B, 5C, 6R, 6B, 6C}

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4 years ago

(a) What resonant frequency would you expect from blowing across the top of an empty soda bottle that is 24 cm deep, if you assu

Kryger [21]

Answer:

a) 357.29 Hz

b) 535.9375 Hz

Step-by-step explanation:

v = Velocity of sound in air = 343 m/s

l = length = 24 cm

$l=\frac{1}{4}\lambda \\\Rightarrow \lambda=4l$

$f=\frac{v}{\lambda}\\\Rightarrow f=\frac{v}{4l}\\\Rightarrow f=\frac{343}{4\times 0.24}\\\Rightarrow f=357.29\ Hz$

∴ Resonant frequency is 357.29 Hz

b) Here one third is filled with soda

So, length becomes $l=24-\frac{24}{3}=16\ cm$

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∴ Resonant frequency is 535.9375 Hz

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4 years ago