Determine what number to multiply the first equation by to form opposite terms for the x-variable.
2/5 x + 6y = -10
–2x – 2y = 40
multiplying the first equation will create opposite x terms.

The manufacturer of a new product developed the following expression to predict the monthly profit, in thousands of dollars, from sales of the productwhen it is sold at a unit price of x dollars.-0.5x^2 + 22x - 224what is represented by the zero(s) of the expression? a. the profit when the unit price is equal to 0b. the unit price(s) when the profit is equal to 0c. the profit when the unit price is greatestd. the unit price(s) when profit is greatest

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0

What is a correct first step in solving the inequality-4(3-5x)> -6x+9