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spin [16.1K]
3 years ago
8

Solve for x: 2/3(x − 2) = 4x. A. x = -2/5 B. x = -5/2 C. x = 2/5 D. x = −2

Mathematics
2 answers:
forsale [732]3 years ago
5 0

Answer:

a

Step-by-step explanation:

malfutka [58]3 years ago
3 0

Answer:

\large\boxed{A.\ x=-\dfrac{2}{5}}

Step-by-step explanation:

\dfrac{2}{3}(x-2)=4x\qquad\text{multiply both sides by 3}\\\\3\!\!\!\!\diagup^1\cdot\dfrac{2}{3\!\!\!\!\diagup_1}(x-2)=(3)(4x)\\\\2(x-2)=12x\qquad\text{divide both sides by 2}\\\\\dfrac{2\!\!\!\!\diagup^1(x-2)}{2\!\!\!\!\diagup_1}=\dfrac{12\!\!\!\!\!\diagup^6x}{2\!\!\!\!\diagup_1}\\\\x-2=6x\qquad\text{subtract}\ x\ \text{from both sides}\\\\x-x-2=6x-x\\\\-2=5x\qquad\text{divide both sides by 5}\\\\\dfrac{-2}{5}=\dfrac{5\!\!\!\!\diagup^1x}{5\!\!\!\!\diagup_1}\\\\-\dfrac{2}{5}=x\to x=-\dfrac{2}{5}

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The reciprocal of 16 in a fraction
Varvara68 [4.7K]

Answer:

The reciprocal of 16 is 1/16

Step-by-step explanation:

The reasoning for this is that the reciprocal of any number is the opposite of it.

Another example would be: The reciprocal of 1/2 would be 2/1

5 0
4 years ago
Please help on one math question
kvv77 [185]
It's f(x) = sin2x

Because when you multiply x by any number greater than 1, the graph will shrink.

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8 0
3 years ago
Dentify all of the following solutions of square root of x plus 10 end root minus 4 equals x
Mrac [35]

Answer:

x = -1.

Step-by-step explanation:

√(x + 10) - 4 = x

√(x + 10) = x + 4

Squaring both sides:

x + 10 = x^2 + 8x + 16

x^2 + 8x - x + 6 = 0

x^2 + 7x + 6 = 0

(x + 6)(x + 1) = 0

<u>x = -6, -1.</u>

Check for any extraneous roots:

√(x + 10) - 4 = x

<u>Try x = -6:</u>

√(-6 + 10) - 4 = 2 - 4 = -2.

but we found x = -6  , so -6 is not a root.

<u>Try x = -1</u>:

√(-1 + 10) - 4 = 3 - 4 = -1. So x = -1 is a root.

3 0
4 years ago
Read 2 more answers
Can someone solve this for me? i also would like to know how you did (worked it out)
Nitella [24]

Answer:

it's

Step-by-step explanation:

(2f+2)(2f-2)

(2f^2-2^2)

7 0
3 years ago
Read 2 more answers
9) Write a function with the following information: initial value is 300,
finlep [7]

Answer:

P(t) = 300e^0.15t

Step-by-step explanation:

The exponential equation for calculating the growth rate is expressed as;

P = P0e^rt

P0 is the initial value =300,

r is the growth rate = 15% = 0.15

t  is the time

Substitute;

P = 300e^0.15t

Hence the function that represent the information is P = 300e^0.15t

7 0
3 years ago
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