Factorise b) x + 3x - 40
1 answer:
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1/32 ; 1/8 ; 1/2 ; 2 ; 8 ; ....
An = 2^2n-7
Pls. see attachment for the graph.
An = 2^2n-7
Pls. see attachment for the graph.
Answer:
x = 240°, x = 300°
Step-by-step explanation:
Using the identity
sin x = =
= -
, then
x = (
) = 60° ← related acute angle
Since sin x < 0 then x is in 3rd / 4th quadrants
x = 180° + 60° = 240°
x = 360° - 60° = 300°
Answer:
(-6, -8) and (6, -8)
Step-by-step explanation:
Think of this as a right triangle
The hypotenuse is 10
The "y" leg is |-8| = 8
x² + 8² = 10²
x² + 64 = 100
x² = 36
x = ±6
two points
(-6, -8) and (6, -8)
