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Katena32 [7]
3 years ago
13

I need help with this please

Mathematics
2 answers:
kodGreya [7K]3 years ago
6 0
1/5(2x - 10) + 4x = -3(1/5x + 4)
0.4x - 2 + 4x = -0.6x - 12
4.4x - 2 = -0.6x - 12
5x - 2 = -12
5x = -10
x = -2
mario62 [17]3 years ago
4 0
\dfrac{1}{5} (2x - 10) + 4x = -3 ( \dfrac{1}{5}x + 4)

Apply distributive property to distribute 1/3 and -3:

\dfrac{2}{5} x -  2 + 4x = - \dfrac{3}{5}x - 12

Sort all the x to the left and the constants to the right:

\dfrac{2}{5} x + \dfrac{3}{5}x  + 4x = - 12 + 2

Simplify:

5x =  -10

Divide by 5:

x = -2


\boxed { \boxed {\text {Answer: x = -2}}}
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It would mean a lot.
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6 0
3 years ago
The speed of light is approximately 299,000,000 meters per second.
jek_recluse [69]

Answer:

2.99 x 10⁸ meters per second

Step-by-step explanation:

Scientific notation (also called "Standard form") is written in the form of a \times 10^n, where  1\leq a < 10  and  n is any positive or negative whole number.

To <u>convert</u> a number into <u>scientific notation</u>, move the decimal point to the left or right until there is <u>one digit before the decimal point.</u>

The number of times you have moved the decimal point is the power of 10 (n).

If the decimal point has moved to the <u>left</u>, the power is <u>positive</u>.

If the decimal point has moved to the <u>right</u>, the power is <u>negative</u>.

<u>To convert the given number to scientific notation</u>

The decimal point for the given number 299000000 is after the last zero:

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Get rid of the redundant zeros:

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Multiply by 10 to the power of the number of decimal places moved:  

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2 years ago
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Answer:

=60 the second option.

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If for example Cos ∅= a, then ∅=Cos⁻¹a

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Cos⁻1 0.5=60°

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