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hram777 [196]
3 years ago
12

Expand the brackets and simplify

Mathematics
1 answer:
Alinara [238K]3 years ago
4 0
3x-1-(3x-3)
3x-1-3x+3
3-1
=2
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a coin lands on heads 200 times. the relative frequency of heads is 0.4. how many times was the coin thrown?
Kazeer [188]

Answer:

The number of times coin thrown was <u>500</u>.

Step-by-step explanation:

Given:

A coin lands on heads 200 times. the relative frequency of heads is 0.4.

Now, to find the times coin was thrown.

Let the number of times coin thrown was be x.

Relative frequency = 0.4.

Number of lands on heads = 200.

So, to get the number of times coin was thrown we put formula:

Relative\ frequency=\frac{Number\ of\ lands\ on\ heads}{Number\ of\ times\ coin\ thrown}

0.4=\frac{200}{x}

<em>By cross multiplying we get:</em>

0.4x=200

<em>Dividing both sides by 0.4 we get:</em>

x=500.

Therefore, the number of times coin thrown was 500.

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4 years ago
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Add the two expressions.<br><br> 3z−4 and 2z + 5<br><br> Enter your answer in the box.
frosja888 [35]
Your answer is 5z+1 (wink) ;D
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3 years ago
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What is 12.1 repeating as a fraction in simplest form?
dem82 [27]
The answer is two, one over nine⬇️
2\ \frac{1}{9}
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3 years ago
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bicycle costs $150. It is advertised on sale for 32% off. What is the cost savings? Solve using two different methods.
alina1380 [7]
The savings is the amount taken off or 32% of 150

32% of 150 is 0.32 times 150=48

savings is $48


or you can do
150/100=x/32
cross multiply to get
x=48


so savings is $48
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two planes traveling in opposite directions leave the airport at the same time. in 4 hours they are they are 2900 miles apart. i
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I Got 650 miles per hour
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