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lakkis [162]
2 years ago
15

Guys help me with a) and b) tasksANSWER:a) 40b) 25Thanks<3​

Mathematics
1 answer:
umka21 [38]2 years ago
8 0

Step-by-step explanation:

there are 2 similar triangles : ABE and DCE

that means they have the same angles, and the scaling factor from one triangle to the other is the same for every side.

and that means that

DE/AE = EC/BE (= DC/AB)

we know that

AE = AD + DE

BE = BC + EC

a.

so, we have actually

DE/(AD+DE) = EC/(BC+EC)

DE/(10+DE) = 8/(2+8) = 8/10 = 4/5

DE = 4(10+DE)/5

5DE = 4(10+DE) = 40 + 4DE

DE = 40 cm

b.

AD/DE = 3/5

BC/EC must be 3/5 too.

15/EC = 3/5

15 = 3EC/5

75 = 3EC

EC = 25 cm

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4 years ago
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Svet_ta [14]

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Step-by-step explanation:

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3 0
3 years ago
In 1999 Daniel was 146 cm tall. He grew to be 176 cm by the year 2006. What was Daniel's rate of growth over this period of his
andreyandreev [35.5K]

Answer:

he grows by 5 cm every year between 1999 and 2006

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3 0
3 years ago
Someone please help me
kap26 [50]

Answer:

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2. Next you simplify the distributed equation, 3/4x + 6 = 9

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8 0
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