Write the quadratic function in standard form. y= 2(x - 9)(x + 7)

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

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

Abc is dilated by a scale factor of 3 with the origin as the center of dilation, resulting in the image a'b'c'. if the slope of line ab is -1.2, what is the slope of line a'b'? a. -1.2b. 3.6c. 1.2d 1.8