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djverab [1.8K]
2 years ago
10

I don’t know this question what is 1/7 • 5/2=?

Mathematics
1 answer:
Andreyy892 years ago
4 0

Answer: what does the dot mean?

Step-by-step explanation: 5/14

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Help me plz plz!!!!!!!!!
Tems11 [23]

Answer:

Decimal form:

2.10526315789

Step-by-step explanation:

6 0
3 years ago
1. A weighted coin is biased so that a head is twice as likely to occur as a tail. If the coin is tossed 4 times, what is the pr
ohaa [14]

Answer:

80/81

Step-by-step explanation:

If a head is twice as likely to occur as a tail, then the probability of getting heads is 2/3 and the probability of getting tails is 1/3.

The probability of getting at least 1 head involves 4 scenarios:

1) 1 Head and 3 Tails

2) 2 Heads and 2 Tails

3) 3 Heads and 1 Tail

4) 4 Heads

Instead of calculate all these scenarios, you could calculate the opposite scenario: 4 Tails. The sum of all possible scenarios is 1, so:

P(at least one head) + P(no heads) = 1

Then, P(at least one head) = 1 - P(no heads)

The probability of 4 tails is:

P(no heads) = P(TTTT) = (1/3)(1/3)(1/3)(1/3)=1/81

Then, P(at least one head) = 1 - 1/81=80/81

7 0
3 years ago
Find an expression for the total surface area of the cylinder.​
kolbaska11 [484]

Answer:

2×π×(1/2)L×L+2×π×((1/2)L)^2

Step-by-step explanation:

perimeter of cross-section × height +2× area of cross-section

8 0
3 years ago
4/10 + 1/2 please help-
Mazyrski [523]

Exact Form:

9 /10

Decimal Form:

0.9

Hope this helps :)

7 0
3 years ago
Read 2 more answers
Use the circles below to find the Greatest<br>Common Factor (G.C.F.) of 72 and 64​
KengaRu [80]

Answer:

8

Step-by-step explanation:

First find all factors of 72 and 64 and put them in their respective circles

The factors of 72: 1,2,3,4,6,8,9,12,18,24,36,72

The factors of 64: 1,2,4,8,16,32,64

Now find the factors that both numbers share.

Common factors: 1,2,4,8

The greatest common factor of 72 and 64 is 8.

3 0
3 years ago
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