Answer:
Step-by-step explanation:
To find the area of a triangle, multiply the base by the height, and then divide by 2. The division by 2 comes from the fact that a parallelogram can be divided into 2 triangles. For example, in the diagram to the left, the area of each triangle is equal to one-half the area of the parallelogram.
Since both fractions mean to divide, I like to divide the numerators by the denominator, and I'll show you how I do it ----
7/10 = 0.7, or 70%
4/5 = 0.8, or 80%
You can now see that the 80% is larger than the 70%, and, this is why 7/10 is less than 4/5 :D
Answer:
The right answer is "516.3978".
Step-by-step explanation:
Given:
Sample mean,
Standard deviation,
Random sample,
We can say that, the sample mean will be equivalent to the population mean.
So,
⇒
hence,
The standard deviation will be:
⇒ =
Answer:
Step-by-step explanation:
x² + b²/4a² = -c / a + b²/4a²
x² + (b/2a)² = -c/a + (b/2a)²
(x + b/2a)² = -c/a + (b/2a)² = -c / a + b²/4a² = (-4ac+ b²)/4a²
(x + b/2a)² = (-4ac+ b²)/4a²
√{(x + b/2a)²} = √{(-4ac+ b²)/4a²}
x + b/2a = √(-4ac+ b²) / √(4a²) = √(-4ac+ b²) / 2a = √( b²-4ac) / 2a
x + b/2a = √( b²-4ac) / 2a
- subtract b/2a from both sides
x + b/2a -b/2a = {√( b²-4ac) / 2a } -b/2a
x = -b/2a + {√( b²-4ac) / 2a }
x = {-b±√( b²-4ac)}/2a
the triangle could only be proven isosceles if it was proven or given that SP = SR or thatangles PQS = RQS otherwise the reasoning is incomplete