5-6. Brianna is a technician at a radio station. She knows that, unlike many other types of waves, radio waves can be very long. Below is the graph for a radio wave that is 1 meter in length.
Here is the function of the radio wave: f(x) = sin (21x)
Graph the function
Write down the amplitude, period, and frequency.
The amplitude is 1
The period is 2
The frequency is 1/2

Aline has a slope of and a y-intercept of –2. what is the x-intercept of the line?

Math it's appreciated. (picture provided)

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?