Which of the following functions defines a reflection across the x-axis? A
(x, y)→(−y, x)
B
(x, y)→(x,−y)
C
(x, y)→(y,−x)
D
(x, y)→(−x, y)

15% chance.

step-by-step explanation:

3/10 times, the 5 year old will get a tablet. 5/10 times, the 13 yer old will get a tablet. multiply both fractions to get 15/100 times, both would have a tablet.

definitely a. the others have almost all data points on one side of the line.

step-by-step explanation:

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°

sina-sinb

cosb+cosa

tana-tanb

cos0+cos x pi/3

20tan

step-by-step explanation: