Answer:
Step-by-step explanation:
The width of the rectangle = x
Therefore the length of the rectangle = 2x, as it is twice its width
We know that the perimeter of a rectangle = 2 × (length + width)
So since the perimeter equals to 30, then we can form the equation:
2×(2x+x) = 30
2×(3x) = 30
6x = 30
x = 5
width of the rectangle = x = 5
length of the rectangle = 2x = 2×5 = 10
If there is an unit which is in the question, remember to add it to the end of the answer. As you have not written any units in the posted question, I will leave it as it is.
Hope this helps :)
Answer:
115/12
Step-by-step explanation:
Answer:
15,6
Step-by-step explanation:
15×104/100=15,6
She make 15,6$ per hour
Answer:
20160
Step-by-step explanation:
in order to find the number of possible essays you can choose from you have to divide the factorial of total no. of essays by the no of essay questions for an exam. ie 8!/ 2! which is 40320/2 = 20160
please mark brainliest
Let
be the set of people infected with the virus, and
the set of people who get a positive result (true or false) when tested for the virus. Any person tested for the virus will get one or the other result and not both, so the events
and
are mutually exclusive:
where
denotes the size/cardinality of a set.
We're told that
and
, which means
.
Similarly, we have
and we know
and
, so
.
The probability of each possible event is obtained by dividing the size of each corresponding set by the total 200. So we have the following table:
The events
and
are independent if
. From the table above, we find that
and
which are not equal, so the events are not independent.