To calculate for the area of the triangle given all its side, use the Heron's formula which is,
A = sqrt ((s)(s - a)(s - b)(s - c))
where A is the area. a, b, and c are the measure of the sides and s the semi - perimeter or half of the perimeter.
With the given above, s = (17 + 18 + 21.4) / 2 = 28.2
Substituting the known dimensions to the Heron's formula,
A = sqrt ((28.2)(28.2 - 17)(28.2 - 18)(28.2 - 21.4)) = 148 units^3
Thus, the area of the triangle is 148 units^3.
Answer:
y < - 8
Step-by-step explanation:
Given
- 6 + y < - 14 ( add 6 to both sides )
y < - 8
This is FACTORISATION.
To solve this problem we have to find the common terms in this equation.
Firstly, between the 5x³ and 10x² the like terms are 5. But the question is, where did the 5 come from? Well in Factorisation, we have to find the HCF between two terms. Here is my answer:
5x³+10x²-25x-50
5x²(1x+2)-25(x+2)-› HCF of 5 and 10 is 5, HCF of 25 and 50 is 25
(1x+2)(5x²-25)-› Add the numbers from the brackets and the numbers outside the brackets.
SO THE ANSWER IS (1x+2)(5x+25)
HOPE THIS HELPS!!!! ;)
There are 12 girls.
To find this, you must first find how many spectators are adults. Multiply 600 by 80% (0.80) to get 480. Then subtract 480 from 600 to get the number of children (120).
Since it asks to find how many girls there are, we multiply 10% (0.10) to 120. This will give you a final answer of 12 girls.
I hope this helps!