El ser vivo mas pequeño es un virus que pesa de orden de 10-8 grs, y el mas grande es la ballena azul que pesa aproximadamente 138 Tns. ¿Cuantos virus seràn necesarios para conseguir el peso de la ballena ?

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

I’ve been trying all day to figure this puzzle out. i need the work for it aswell. it is a factoring polynomials tarsia. the image is below.

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.