• 2. Find the probability that she gets a 5.*

Mathematics

1 answer:

vitfil [10]3 years ago

7 0

Answer:

The correct option is (b).

Step-by-step explanation:

We need to find the probability of getting 5 when Janet rolls a regular eight-sided die with numbers 1 to 8.

The formula for probability of getting an event is given by :

$P=\dfrac{Favourable\ outcome}{Total\ no\ of\ outcomes}$

Here, favourable outcome = 1

Total outcomes = 8

So,

$P=\dfrac{1}{8}$

So, the correct option is (b).

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Person 1 can do a certain job in twenty-one minutes, and person 2 can do the same job in twenty-eight minutes. When completing t

eimsori [14]

The <em>correct answer</em> is:

C) x/21

Explanation:

Since Person 1 can complete the entire job (100% = 1/1 = 1) in 21 minutes, this person can complete 1/21 of the job per minute. This is Person 1's rate. If x is the amount of time it takes both people together to finish the job, then the amount of work Person 1 does would be (1/21)(x) = x/21.

7 0

3 years ago

I need help on this question

Morgarella [4.7K]

Answers : A and D

Step - by - step explanation :

tip : when finding constant of proportionality it's always Y divided by X

A = what is 22.5 divided by 3 ? 7.5 ( now multiply 7.5 by the next X [ 4 ] )

what is 7.5 x 4 ? 30 ( and since on the graph it also says 30 then you can assume this one has a proportional relationship )

B = what is 12 divided by 3 ? 4 ( now multiply 4 by the next X [ 5 ] )

what is 4 x 5 ? 20 ( and because the graph says 25 then you know it's NOT a proportional relationship )

C = what is 8.5 divided by 2 ? 4.25 ( now multiply 4.25 by the next X [ 5 ] )