1. Martina used an app to simulate a coin flip 200 tirales. Hands on teads 91 times. Based on her results, Martine predicts that the expected number of times the coin will lands on heads in 1000
100 times
300 times
450 times
455 times

455

Step-by-step explanation:

This is based on her work, but if this was real, it would actually be 50% as the probability never changes.

maybe - definition of supplementary angles. im not sure. sorry

step-by-step explanation:

p ÷ r = tan(x)

step-by-step explanation:

given that there is a figure below shows a right triangle: a right triangle is shown with hypotenuse equal to q units and the length of the legs equal to p units and r units.

graph is missing so i will create the graph as per given information.

the angle between the legs having lengths p units and q units is y degrees. the angle between the legs having lengths r units and q units is x degrees.

now we need to find about what is p ÷ r equal to.

so we can use trigonometric ratio tan(x)=[altitude]/[base] to find the value of p ÷ r, because p is the altitude and r is the base.

p ÷ r=tan(x)

hence final answer is p ÷ r=tan(x).