Each of three friends flips a coin 75 times. The results for each friend are shown in the tables. Find the relative frequency for the event ​"tails​" for each friend. If the friends combine their results to get 124 heads and 101 ​tails, what is the relative frequency for the event ​"tails​"? Use pencil and paper. Suppose each friend flips a coin 750 times. Is there a value you would expect the relative frequency for the event ​"tails​" to be close​ to?

triangle abc is reflected on the line x=-6.5 then reflected again on the x axis

step-by-step explanation:

whats the

i'm sorry i don't know

step-by-step explanation:

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81