Find three consecutive numbers whose sum is 219

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

Beth divided 9 ounces of her granola recipe into 4 equal-sized amounts. she placed the amounts into individual bowls. the fraction 9/4 represents the number of ounces of granola in each bowl. which other number represents the amount of granola beth has in each bowl? (a) 1 1/4 (b) 2 1/4 (c) 1 3/4 (d) 3 3/4 i need !

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.