4) The mass of a chest is 498 kg when it is 1/2 filled with treasure. The mass of the same chest is 712 kg when it is 3/4 filled with treasure.
What is the mass of the empty chest?

the answer is here: : )

:

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation: