2 meters were used in 10 masks
2meters/10masks= 0.2meters per mask
3-2= -3x-x
1 = -4x
x = -1/4
Yes it is possible
A1. 12 i.e option D
A2. 3n-7 i.e option A
A3. -6n+20 i.e option D
A4. -70 i.e option C
Step-by-step explanation:
aₙ = a₁ + (n - 1) × d
aₙ = the nᵗʰ term in the sequence
a₁ = the first term in the sequence
d = the common difference between terms
Using the above formula to solve the first part, we have :
For the second part, we have :
For the third part, we have :
For the fourth part, we have :
The last choice: Running up a hill, then walking up a hill, turning around and running down the hill, then walking down the hill
