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3 years ago

Help this is due tomorrow

Mathematics

2 answers:

nlexa [21]3 years ago

8 0

Answer:

n = 1.40 (second option)

kolezko [41]3 years ago

4 0

Answer:

The choice second;

$n = 1.40$

Step-by-step explanation:

$0.7n + 0.8n = 2.1 \\ 1.5n = 2.1 \\ \\ n = \frac{2.1}{1.5} \\ \\ n = \frac{21}{15} \\ \\ n = 1.4$

I hope I helped you^_^

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Answer:

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3 years ago

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Nuts.com sells raw almonds for $10 per pound and roasted pistachios for $12 per pound. Christopher spends $70, before taxes and

sp2606 [1]

Christopher purchased 2.8 pounds of almonds and 3.5 pounds to roasted pistachios.

Step-by-step explanation:

Cost of almonds per pound = $10

Cost of roasted pistachios = $12

Total amount spent = $70

Weight of nuts = 6.3

Let,

Weight of almonds = x

Weight of roasted pistachios = y

According to given statement;

x+y=6.3 Eqn 1

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Multiplying Eqn 1 by 10

$10(x+y=6.3)\\10+10y=63\ \ \ Eqn\ 3$

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Dividing both sides by 2

$\frac{2y}{2}=\frac{7}{2}\\y=3.5$

Putting y=3.5 in Eqn 1

$x+3.5=6.3\\x=6.3-3.5\\x=2.8$

Christopher purchased 2.8 pounds of almonds and 3.5 pounds to roasted pistachios.

Keywords: linear equations, elimination method

Learn more about elimination method at:

#LearnwithBrainly

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