X = 10 + square root of 110. OR...
X = 10 - square root of 110
Answer:
where is the table
Step-by-step explanation:
Answer:
Dave gets £5
Explanation:
1 + 7 = 8
40 / 8 = 5
1 x 5 = 5
7 x 5 = 35
Answer : 82.27cm²
Method :
First work out the area of the semi circle.
To do this we find the area a circle and half it.
The radius of the semi circle is 4.
To find the area of a circle is it radius² x π
Therefore the area of the semi circle is 4 ² x π
Then divide this by 2.
Then you should get 16 π which equals 50.26548246 cm ².
Then find the area of the triangle.
The area of a triangle is base x height divided by 2.
Therefore you should get 9 x 8 divided by 2 which you should get to 36 cm ².
Then add the two together to get
86. 26548246.
Then round to the newest hundredth to get to the final answer of 86.27cm².
-- He must have at least one of each color in the case, so the first 3 of the 5 marbles in the case are blue-green-black.
Now the rest of the collection consists of
4 blue
4 green
2 black
and there's space for 2 more marbles in the case.
So the question really asks: "In how many ways can 2 marbles
be selected from 4 blue ones, 4 green ones, and 2 black ones ?"
-- Well, there are 10 marbles all together.
So the first one chosen can be any one of the 10,
and for each of those,
the second one can be any one of the remaining 9 .
Total number of ways to pick 2 out of the 10 = (10 x 9) = 90 ways.
-- BUT ... there are not nearly that many different combinations
to wind up with in the case.
The first of the two picks can be any one of the 3 colors,
and for each of those,
the second pick can also be any one of the 3 colors.
So there are actually only 9 distinguishable ways (ways that
you can tell apart) to pick the last two marbles.