Things I Don't Know Flashcards
(20 cards)
Complete the square:
X²-10x-5
(x-5)²-25-5
(x-5)²-30
Complete the square:
2x²-10x-5
2(x²-5x-2.5)
2(x-2.25)²-6.25-2.5
2(x-2.5)²-8.75
F is a function such that 3÷(2x+5):
Find the inverse function.
Y = 3÷(2x+5)
X = 3÷(2y+5)
Inverse function = (3x-5)÷2
Change 3/(x²) into an indicie
fraction
3× 1/x²
= 3x to the power of minus 2
From what axis do you find the interquartile range?
Take the first and last 25% from the y-axis or cumulative frequency line
If dy/dx= 2x, find the gradient when x=4.
2(4)= 8
s= displacement t= time S= 5t³+t²
what is the equasion for velocity?
what is the equasion for acceleration?
velocity= ds/dt= 15t²+2t acceleration= dv/dt= 30t+2
What is the relationship between alternate angles or ‘Z’ angles?
They are equal
What is the relationship between corresponding angles or ‘F’ angles?
They are equal
What is a tangent?
a line that just touches the outside of a circle
What is a chord?
a line that cuts a circle throught the inside
What is a sector?
a wedge shaped part of the circle from the centre
What is an arc?
a part of the circumference
What is a segment?
the area from when a circle is cut with a chord
learn circle theorums
because i cant add media with the free version
density=
mass/ volume
pressure=
force/ area
what can you deduce is XY:AB = 2:3
they are similar truangles so they have the same direction. therefore if Y and A are the same point, they lie on hte same line
look over interquartile range before the test
?
On a graph, is x= 0>x≥10 and the cumulative frequency= 4, where would this point go on the graph?
x=10,
y=4
(10,4)
you take the greatest value of x
