ana are un buchet de flori pe care le distribuie unui grup de elevi astfel:daca fiecarui efev din grup i ar da cate 3 flori, atunci 4 elevi nu ar primi nicio floare, iar un elev ar primi o singura floare. daca fiecarui efev din grup i ar feri 7 flori, atunci 12 elevi nu ar primi nicio floare, iar un elev ar primi 5 flori. cati elevi sunt in grupa si cate flori sunt in buchet.

i believe it is 0.1m because the measurement of 30.4m limits how precise you can be

you can only be as precise as the least precise measurement

-3.5 degrees per hour

step-by-step explanation:

find the unit rate:

-12   1/4 degrees           12.25 degrees

= - = -3.5 degrees per hour

      3   1/2 hours               3.5 hours

look at the picture.

1.

ef : ab = 2 : 3

gf : cb = 2 : 3

gh : cd = 2 : 3

he : da = 2 : 3

2.

∠a ≅ ∠e

∠b ≅ ∠f

∠c ≅ ∠g

∠d ≅ ∠h

3.

use pythagorean theorem:

the length of the abcd trapezoid sides:

|ab| = 3 cm

|bc| = 10 cm

|cd| = 3(3) cm = 9 cm

|da| = 8 cm

the perimeter of abcd = 3 + 10 + 9 + 8 = 30 cm

the ratio of perimeters of the tarapezoids is equal 2 : 3.

substitute:

      cross multiply

      divide both sides by 3