given the system of equations presented here: 4x+y=4 2x+7y=28 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (-4, 0) and (6,0). the y-intercept of thefirst parabola is (0, –12). the y-intercept of the second parabola is (0-24). what is the positive difference between the avalues for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth.

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin.how many doctors use brand x aspirin

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.