The length of a thread is 40 feet. the thread is cut into two parts such that one part is 12 cm shorter than the other part. find the length of the longer part. m. epoy and junjun can do a certain job in 10 hours if they work together. if epoy can do job in 15 hours, how long will it take junjun to do the job alone? search project: do a research on the different patterns found in objects, plants, and and that can be modeled mathematically. vects, plants, and animals

Step-by-step explanation:

First we have 40 ft = 1219.2 cm (we need need to work in the same unit sistem)

Then we have

X+y=1219.2

X=y+12

Change the x in the first equation for 'y+12' and qe have

Y +12 + y = 1219.2

2y + 12 = 1219.2

2y=1219.2-12

Y=1207.2/2

Y=603.6 cm

And the longest side x=615.6cm

M) E + J =15 hs

If Epoy can do the job in 15 hs means that in 10 hs he is going to do 2/3 of the job ans Junjun will have to do the 1/3 of thejob.

If Junjun can do 1/3 en 15 hs, he would need 45 hs to do it himself

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

pls mark as brainliest