1. In a parallelogram ABCD, three vertices are A(-3,1), B (2,4) and C(3,1). (a) Find the midpoint of the diagonal AC. (b) Find the coordinates of D. (c)the length of the diagonal AC (d) the perimeter of ABCD. 2. Find the area of A PQR where P (0,7), Q (5,-5) and R (10,7).​​

i found two solutions,   n = 2 • ± √3 = ± 3.4641

step-by-step explanation:

answer: 42

use a calculator to find that 845/73 = 11.575

the whole part of the answer is 11. multiply this by 73 to get 11*73 = 803.

subtract that result from 845 to get 845 - 803 = 42

7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

step-by-step explanation:

the ratio of grapes to blueberries she should use is 12: 3

step-by-step explanation:

if mandie is making 15 cups of fruit salad, the ratio of grapes to blueberries she should use is 12: 3.