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45m

Step-by-step explanation:

3*4.5 =13.5

7*4.5= 31.5

13.5+31.5= 45m

(you would do 4.5 because each triangles length is only half of the 9m across. you also would not have to divide by 2 like you usually would when finding the area of a triangle becuase there are 2 congruent triangles)

the ratio of white tiles to blue tiles is 48: 16. the ratio in it's simplest form is 3: 1.

step-by-step explanation:

ratio: take the first number and add a colon next to it, then add the second number after that. make sure the ratio order matches up with the written problem!

simplest form: we can simplify the ratio 48 : 16 by dividing both terms by the greatest common factor (gcf).

the gcf of 48 and 16 is 16.

divide both terms by 16:

48 ÷ 16 = 3

16 ÷ 16 = 1

reducing to simplest form:

48 : 16 = 3 : 1