Find the discriminant to determine the number of roots, then solve the quadratic equation using the quadratic formula. 2x^2+7x-4=0

How do i make someone brainliest? (if you answer me, i might be able to make you brainliest! )

Pls if a cow has a mass of 9×10^2 kilograms, and a blue whale has a mass of 1.8×10^5 kilograms, which of these statements is true?

Suppose that in 2008 , 840,800 citizens died of a certain disease assuming the population of teh country is 399 miliion, what is the mortality rate in units of deaths per 100,000 people?