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polet [3.4K]
3 years ago
15

12x+4y=1 6x-2y=3 substitution, elimination, or graphing ?

Mathematics
1 answer:
goldfiish [28.3K]3 years ago
8 0

Answer:

y = -5/8

x = 7/24

Step-by-step explanation:

elimination

12x + 4y = 1 | ×1 |

6x - 2y = 3 | ×2 |

12x + 4y = 1

12x - 4y = 6

_________--

8y = -5

y = -5/8

elimination

12x + 4y = 1 | ×1 |

6x - 2y = 3 | ×2 |

12x + 4y = 1

12x - 4y = 6

_________+

24x = 7

x = 7/24

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In simplest form: 2 10101/62500
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Loni needs between 3.5 and 7.2 volts of energy, not inclusive, to make an experiment work correctly. Write a compound inequality
Evgesh-ka [11]

Answer:

<em>The compound inequality that shows the voltage amount the necessary range is  3.5</em>

Step-by-step explanation:

Loni needs between 3.5 and 7.2 volts of energy, not inclusive, to make an experiment work correctly.

That means, <u>the voltage amount should be either greater than 3.5 volts or less than 7.2 volts</u>.

Suppose, the amount of voltage is V volts to make the experiment work correctly.

Now, Voltage amount is greater than 3.5 volts means:  V>3.5 or 3.5

and voltage amount is less than 7.2 volts means:  V

Thus, the compound inequality by combining the above two inequalities will be:   3.5

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3 years ago
Give your answer as a mixed number<br> 4 3/7 - 2 5/7<br> get brainliest urgent plz help
serg [7]

Answer:

1\frac{5}{7}

Step-by-step explanation:

4\frac{3}{7} -2\frac{5}{7}

Step 1. Simplify left side 4*7+3 , Right Side 2*7+5

=\frac{31}{7} -\frac{19}{7} = \frac{12}{7}

Step 2. Re-write 12/7 as mixed number

\frac{12}{7} = 1\frac{5}{7}

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En una ferretería venden bombas de llenado de agua, (suben el agua de una cisterna a un tinaco). Una característica importante d
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3 years ago
Homework kills guys, please help
Kazeer [188]

Answer:

The correct answer is in bold below written in two different ways. I think that the two middle options of your problem were given by mistake. The correct answer is not in the options.

Step-by-step explanation:

cost of yogurt = cost of toppings + cost of yogurt with 1 topping

cost of yogurt with 1 topping = $3.65

cost of yogurt = cost of toppings + 3.65

cost of 1 additional topping = $0.45 * 1

cost of 2 additional toppings = $0.45 * 2

cost of x additional toppings = $0.45 * x = 0.45x

Since 1 topping is included in the $3.65 charge, if you pay for x additional toppings, you will have x + 1 total number of toppings. That means you must pay for only x - 1 additional toppings to have a total of x toppings.

One topping is already included in the $3.65 charge, so you pay for only x - 1 additional toppings.

cost of x - 1 additional toppings = 0.45(x - 1)

cost of yogurt = 0.45(x - 1) + 3.65

y = 0.45(x - 1) + 3.65

y = 0.45x - 0.45 + 3.65

y = 0.45x + 3.2

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3 years ago
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