Answer:
7 students play an instrument.
Calculation:
35=100%
20%=[20×35]÷100
=7
13 red, 5 blue, 7 green...for a total of 25
percentage of green ones is : 7/25 = 0.28 = 28% <==
Answer:

Step-by-step explanation:
When you reflect a point (x, y) in the y-axis, the y-coordinate remains the same, but the x-coordinate gets the opposite sign. Thus,
E (8,4) ⟶ E' (-8,4)
F (-16,-8) ⟶ F' (16,-8)
G (24,-16) ⟶ G' (-24,-16)

The figure EFG and its reflection E'F'G' are shown in the diagram below.
Answer:
1242.81
Step-by-step explanation: