Step-by-step explanation:
the first one
10 - 4x - 5 + 2x
-4x + 2x = -2x
10 - 5 = 5
so, in sum,
-2x + 5
Answer:
B
The central angle is twice the angle on the circumference, subtended on the same arc, then
a = 0.5 × 110° = 55° → B
the range is 39-18= 21
IQR is 35-21=14
