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Neko [114]
4 years ago
13

ed spent 35% of his time on roller coasters. if he was there for 8 hours, how much time did he spend on roller coasters

Mathematics
1 answer:
Vsevolod [243]4 years ago
8 0

0.35= 35%    0.35 * 8= 2.8   Ed spent 2.8 hours of his time on roller coasters.
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Divide. Write your answer as a fraction or mixed number in simplest form.<br><br> 9 1/3 • 7
nordsb [41]

Answer:

65 1/3 or 196/3

Step-by-step explanation:

9 1/3 can be written as 28/3 (9 times 3 plus 1)

28/3 times 7/1 (because any whole number can have a 1 as the denominator)

Multiply top to top and bottom to bottom

28 times 7/ 3 times 1

196/3

Simplify to

65 1/3 but 196/3 will work out as well

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3 years ago
Write each ratio in simplest form<br> 64:40
Alona [7]
The largest GCF of both 64 and 40 would be 8

When you do 64/8 you get 8
When you do 40/8 you get 5

SO the final answer is 8:5

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4 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
Find the value of k if: (2x − y)² − (2x + y)² = 4xyk​
Viefleur [7K]

Answer:

k = - 2

Step-by-step explanation:

( 2x - y )²

Formula : -

( a - b )² = a² + b² - 2ab

Here,

a = 2x

b = y

( 2x - y )²

= ( 2x )² + y² - 2 ( 2x ) ( y )

= 4x² + y² - 4xy

So,

( 2x - y )² = 4x² + y² - 4xy

( 2x + y )²

Formula : -

( a + b )² = a² + b² + 2ab

Here,

a = 2x

b = y

( 2x + y )²

= ( 2x )² + y² + 2 ( 2x ) ( y )

= 4x² + y² + 4xy

So,

( 2x + y )² = 4x² + y² + 4xy

( 2x - y )² - ( 2x + y )²

= 4x² + y² - 4xy - ( 4x² + y² + 4xy )

= 4x² + y² - 4xy - 4x² - y² - 4xy

= 4x² - 4x² + y² - y² - 4xy - 4xy

= 0 + 0 - 8xy

= - 8xy

( 2x - y )² - ( 2x + y )² = 4xyk

- 8xy = 4xyk

Divide 4xy on both sides,

- 8xy / 4xy = 4xyk / 4xy

- 2 = k

k = - 2

Therefore, the value of k is - 2.

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