In Exercise 3 and 4, write the property that justifies each steps 3. 3x - 12 = 7x + 8

-4x - 12 = 8

-4x = 20

X = -5

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

Aliter of water contains about 3.35 x 10^25 molecules. a certain river discharges about 2.9x 10^8 l of water every second. about how many molecules does the river discharge every minute? write your answer in scientific notation

Ahmed plans to add a rectangular sunroom to his house. the sunroom will have a length of 14 feet and a width of 10 feet, and the construction will cost $40 per square foot. how much more would the sunroom cost if it’s width were increased to 12 feet?