After a dreary day of rain, the sun peeks through the clouds and a rainbow forms. You notice the rainbow is the shape of a parabola.
The equation for this parabola is y = -x^2 + 19.
Please solve all parts of the problem accurately!

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

What is the lcm of 16 and 40 ? 24 and 40 ?

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.