A lake’s level dropped 3 3/4 inches for 21 days during a drought. A heavy rainstorm raised the level by 8.25 feet. Afterwards the level dropped 9.5 inches per day for 4 days. Scientists want to determine if the water level increased. Use your knowledge of rational numbers to determine the change in water level

Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.