Answer:
5. 2
6. -1
7. undefined
Step-by-step explanation:
If we try to simplify the ratio or try to multiply both by any number, we will get the equivalent ratio
Like :

Divide ( simplify ) by 2

Or multiply by any number,

From the example, 2 / 3 and 8 / 12 are equivalent ratios to 4 / 6
Answer:
E green team, because their score starts from 75 to 90, whiles the red starts from 80 to 85
∠D= 87°, ∠E = 50°
Sum of three angles in a triangle is 180°
∠F = 180 - (∠D + ∠E)
∠F = 180 - (87 + 50)
∠F = 180 - 137
∠F = 43°
Side opposite to greatest angle is the longest side.
Among angle D, E and F, angle D is the greatest angle
So side opposite to angle D is the longest side which is EF
Option B is the answer
For the equation to = 0 , one of the components must = 0
x = 0
x = -13/9
x = -2/11
(Make each bracket = 0)
e.g. 9x+13=0
9x = -13
x = -13/9