Is the inequality below sometimes, always, or never true?

-2(2x + 9) > -4x + 9

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

How do you find the area of a triangle

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c = f