Answer:
12_(1.5,2)
13_(3,2)
14_8.5
15_6
16_-1.5
17_-4.5
18_2.5
19_3
28_(-7,-5)
38_1.8
40_1.5
42_1.6
Explanation:
12_ midpoint formula x1+x2/2 , Y1+Y2/2
-7+4/2 , 2+2/2
-3/2 , 4/2
(1.5,2)
13_3+3/2, 9+(-5)
6/2, 4/2
(3,2)
14-19 just find the middle between the 2 numbers
for 20-27 just repeat what i did in question 12 and 13
28_ to get from 1 to -3 you have to -4 so to find the x of the other endpoint you have to -4 from -3 same goes for the Y coordinate to get from 7 to 1 you have to -6 to find the Y for the other endpoint you have to -6 again from one
same goes for questions 29-33 its easier to draw a number line and do it their
38_the distance between -4 and 5 which is 9 then you have to find 1/5 of 9 which is 1/5 x 9 = 1.8
40_the distance between -7 and 2 which is 9 then you have to find 1/6 of 9 which is 1/6 x 9 = 1.5
42_distance formula √(x1- x2)²+(Y1-Y2)²
√(2-(-5)²+(9-5)²
√7²+4²
√49+16
√65
=8.0
1/5 x 8.0 =1.6
The rest of the answers and solutions are in the pdf