The stress distribution on a structure is given by s=2x^2+4x−30 where s is stress in pounds per square inch and x is the distance in feet from a reference point. At what distance is the stress equal to 0? f)6 ft g)3 ft h)12 ft j)5 ft

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Need so much on this one how many yards?