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JulsSmile [24]
3 years ago
12

Sam has a barn that is 16 feet high. He needs to replace a piece of roofing and wants to use a ladder that will rest 8 feet from

the building and still reach the top of the building. What length ladder should he use?
Mathematics
1 answer:
Alex777 [14]3 years ago
4 0

Answer: the length of the ladder should be 17.9 feet

Step-by-step explanation:

The ladder would form a right angle triangle with the building and the ground. The length of the ladder represents the hypotenuse of the right angle triangle. The height from the top of the ladder to the base of the building represents the opposite side of the right angle triangle.

The distance from the bottom of the ladder to the base of the building represents the adjacent side of the right angle triangle.

To determine the length of the ladder h, we would apply Pythagoras theorem which is expressed as

Hypotenuse² = opposite side² + adjacent side²

h² = 16² + 8² = 256 + 64

h² = 320

h = √320 = 17.9 feet

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John’s father is 5 times older than John and John is twice as old as his sister Alice. In two years time, the sum of their ages
oksano4ka [1.4K]

Answer:

8 years

Step-by-step explanation:

Let age of father be f

age of John be j

age of Alice be a

John's father is 5 times as old as John. We can write:

f = 5j

John is twice as old as Alice. We can write:

j = 2a

or

a = j/2

SUM OF ALL OF THEIR AGES (after 2 years) will be 58. We can write:

f+2 + j+2 + a+2 = 58

This becomes:

f + j + a + 6 = 58

f + j + a = 52

Now, we replace third equation with the first two (in bold) and get:

f + j + a = 52\\5j + j + \frac{1}{2}j=52\\6.5j=52\\j=8

So John is 8 years old

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3 years ago
I just need help with first 2! Show work please it’s due soon and round answers to the nearest tenth !!!
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Answer:

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