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3 years ago

Hi, could anyone help me these questions

Mathematics

1 answer:

PIT_PIT [208]3 years ago

3 0

Answer:

1. £123120

2. £13.69

4. £1200

5. £105

Step-by-step explanation:

1. 108000 multiplied by 114% = 123120

2. 18.5 multiplied by 1-0.26 = 13.69

4. x (1.65) = 1980

x=1200

5. 113.4 = 1.08x

x= 105

I don't know about #3

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Step-by-step explanation:

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$Hence\ solution\ of\ following\ system\ of\ equation\ will\ give\ cost\ of\ donut:\\\\3y+6x=22\\\\y=3.25\\\\\\Substitute\ y=3.25\ in\ first\ equation\\\\3\times 3.25+6x=22\\\\9.75+6x=22\\\\6x=22-9.75\\\\6x=12.25\\\\x=\frac{12.25}{6}\\\\x=\frac{49}{24}\approx \$2.042\\\\Cost\ of\ donut=\frac{49}{24}\approx \$2.042$

See attached diagram.

$Each\ friend\ takes\ 2\ donuts\\\\Total\ donuts=Number\ of\ friends\times 2\\\\Total\ donuts=3\times 2=6\\\\cost\ of\ donuts=number\ of\ donuts\times cost\ of\ 1\ donut\\\\cost\ of\ donuts=6\times \frac{49}{24}\\\\cost\ of\ donuts=\frac{49}{4}\approx \$12.25$

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3 years ago

Fill in the last two boxes.

White raven [17]

45+ 35+20=100
R=100=45
N =128

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4 years ago