Bella saw that 7 out of 11 people brought an umbrella to the beach. there were 99 people there. how many of them did not have a beach umbrella

So if 7 out of 11 people DID bring an umbrella, that means that 4 out of 11 people didn't. So cross  multiply! (:
4/11 = x/99
In order to get x, 99 times 11, then divide that by 6 to get 36. x=36.
So 36 people did not have a beach umbrella. 
xx

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's

Answer d; a supplementary angle = 180°, so if that angle = 150°, y would = 30°.