Question

i need some answers checked

Answer 1

@Vocaloid

Answer 2

good

Answer 3

good

Answer 4

good

Answer 5

good

Answer 6

good

Answer 7

good

Answer 8

good

Answer 9

good

Answer 10

good

Answer 11

good

Answer 12

it's asking for the area of the image not the original triangle

the original triangle has the area 24

the scale factor is 0.5 as indicated in the problem

so new area = area * scale factor * scale factor = ?

Answer 13

12?

Answer 14

remember for area you have to multiply by the scale factor twice.

new area = area * scale factor * scale factor = 24 * 0.5 * 0.5

Answer 15

6

Answer 16

good, so 6 = your sol'n

Answer 17

be careful about your positive and negative signs

since D = (-2,-1) you multiply it by 2.5 to get (-5,-2.5) not (-5,2.5)

repeat this logic with the other coordinates to get the correct sol'n

Answer 18

i did it again and i now got D

Answer 19

good, D = your sol'n

Answer 20

not quite

the original is 25.5 by 33

if the scale factor is 1.4, the second dimension is then 33 * 1.4

Answer 21

46.2

Answer 22

good

Answer 23

the length of QR is 5
the scale factor is 1.5

so simply multiply length of QR * scale factor to get Q'R'

Answer 24

7.5?

Answer 25

good

Answer 26

good

Answer 27

hm not quite

let's start from the beginning - what's the area of the original triangle? remember that area = (1/2)b*h

Answer 28

46? 3*3*3

Answer 29

46? look at the original triangle, its area is a lot smaller than 46

what are the base and the height?

Answer 30

both 6

Answer 31

notice how the base is 4 squares not 3

so the base is 8 not 6

Answer 32

so (1/2)*base*height = ?

Answer 33

4

Answer 34

the base is 8
the height is 6

(1/2)*base*height = ?

Answer 35

base = 8
height = 6

(1/2)*base*height = (1/2)*8*6 = ?

Answer 36

24?

Answer 37

good

now, we multiply by the scale factor twice

so 24 * (1/4) * (1/4) = ?

Answer 38

1.5

Answer 39

good

Answer 40

good

Answer 41

do you still have more work to do? don't wanna rush you or anything, jw