People spend a lot of money on bottled water. But do they really prefer bottled water to ordinary tap water? Researchers at Longwood University (Lunsford and Dowling Fink,
2010) investigated this question by presenting people who came to a booth at a local
festival with four cups of water. Three cups contained different brands of bottled water,
and one cup was filled with tap water. Each subject (person) was asked which of the four
cups of water they most preferred. Researchers kept track of how many people chose tap
water in order to see whether tap water was chosen significantly less often than would
be expected by random chance.

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a

the answer is 8.64

step-by-step explanation:

chemists are often responsible for designing a chemical reaction and analyzing the products obtained from it. one significant part of designing a chemical reaction is determining the amount of each reactant that is needed and the amount of each product that will be produced. in order to do so, chemists use stoichiometry, the quantitative relationships between reactants and products.

add them

step-by-step explanation:

idk you did not give the options or numbers so you cant solve it