3 years ago

Can someone help please??

Mathematics

1 answer:

marishachu [46]3 years ago

4 0

Answer:

Step-by-step explanation:

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Evaluate the following expression. 6 squared -1

natita [175]

Answer:

Step-by-step explanation:

$6^2 - 1\\36-1\\35$

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3 years ago

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What is the probability of tossing a penny and landing on heads 3 times in a row

Rasek [7]

Answer:

Suppose you have a fair coin: this means it has a 50% chance of landing heads up and a 50% chance of landing tails up. Suppose you flip it three times and these flips are independent. What is the probability that it lands heads up, then tails up, then heads up? So the answer is 1/8, or 12.5%.

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2 years ago

Although five of John's answers were incorrect, 90% of his answers were correct. How many questions did John answer in all?

fiasKO [112]

Answer:

John answered 50 questions.

Step-by-step explanation:

Although five of John's answers were incorrect, 90% of his answers were correct.

This means that 5 is 100 - 90% = 10% of the total number of questions, n. So

$0.1n = 5$