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3 years ago

12

polygon EFGH is similar to polygon JKLM, and EF and JK are corresponding sides. you know the perimeter of each polygon and you k

now the measure of GH. what can you find?

1 answer:

Savatey [412]3 years ago

8 0

This means you can now find the measure of LM :)

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A rock is dropped from a height of 100 feet. Calculate the time between when the rock was dropped and when it landed. If we choo

Fiesta28 [93]

Answer:

A

Step-by-step explanation:

the rock lands when it reaches height 0.

so, for what t is h(t) = 0 ?

16t² - 100 = 0

16t² = 100

now we pull the square root on both sides (we can ignore the negative solutions, as negative seconds don't make any sense in our scenario)

4t = 10

t = 10/4 = 5/2 = 2.5 seconds

so, A is correct.

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2 years ago

If 3/4 of a certain number is equal to 41/2 find the number

SSSSS [86.1K]

Answer:

$x = \frac{82}{3}$

Step-by-step explanation:

let $x$ be that number

$(\frac{3}{4} )x = \frac{41}{2}$

$\frac{3x}{4} = \frac{41}{2}$

multiply both sides by $4$

$\frac{3x}{4} * 4 = 4 * \frac{41}{2} \\3x = \frac{41 }{2} * 2 * 2\\3x = 41 *2 \\3x = 82 \\$

divide both sides by 3

$\frac{3x}{3} = \frac{82}{3}$

$x = \frac{82}{3}$

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3 years ago

Mr green makes some compost he mixes soil, manure and leaf mould in the ratio 3:1:2 mr greenmakes 72 literes of the compost. How

love history [14]

Answer:

$36\ liters\ of\ soil$

Step-by-step explanation:

we know that

The ratio of soil, manure and leaf mould is $3:1:2$

That means

For every 6 liters of the compost, he use 3 liters of soil

so by proportion

Find how many liters of soil does he use for 72 liters of compost

$\frac{3}{6}=\frac{x}{72}\\ \\x=3*72/6\\ \\x=36\ liters\ of\ soil$

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3 years ago

Find the number of 4 digit numbers that can be formed using the digits 1,2,3,4,5 if no digits is no repeated

loris [4]

Answer:

5 different numbers, 2 even

Step-by-step explanation:

Since we have 5 digits and they are non repeating we can use the permutation formula:

$P(n, k) = \frac{n!}{k!}, $where $ k \leq n ; k, n \in \mathbb{N}$

It gives us the amount of ways to arrange k objects out of n objects without repetition, but order does matter.

In our case the amount of 4 digit numbers that can be formed using the digits from 1 to 5 is: $P(5, 4) = \frac{5!}{4!} = 5.$

And out of those 5, only 2 are even

4 0

3 years ago

How do I solve this ?

pashok25 [27]

M(CE) = 78 + 78*4/26 = 90

6 0

3 years ago

Read 2 more answers