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3 years ago

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104 km=_ m? 480cm=_ m? 5.6kg=_ g? 8mm=_ cm?

1 answer:

Anastasy [175]3 years ago

8 0

$1km=1,000m\\therefore\ 104km=104\times1,000m=\boxed{104,000m}\\\\1m=100cm\to1cm=0.01m\\therefore\ 480cm=480\times0.01m=\boxed{4.8m}\\\\1kg=1,000g\\therefore\ 5.6kg=5.6\times1,000g=\boxed{5,600g}\\\\1cm=10mm\to1mm=0.1cm\\therefore\ 8mm=8\times0.1cm=\boxed{0.8cm}$

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X and y vary inversely and x=50 when y=5 find y when x=10 what is k?

Kisachek [45]

Answer:

Part A)

1) $k=250$

2) $y=25$

Part B)

1) $k=7$

2) $y=84$

Step-by-step explanation:

Part 1) x and y vary inversely and x=50 when y=5 find y when x=10 what is k?

we know that

A relationship between two variables, x, and y, represent an inverse variation if it can be expressed in the form $y*x=k$ or $y=k/x$

step 1

<u>Find the value of k</u>

x=50 when y=5

substitute the values

$y*x=k$ ------> $5*50=k$ -----> $k=250$

The equation is equal to

$y*x=250$ or $y=250/x$

step 2

<u>Find y when x=10</u>

substitute the value of x in the equation and solve for y

$y*(10)=250$

$y=250/10=25$

Part B) x and y vary directly and x=6 when y=42 find k what is y when x=12

we know that

A relationship between two variables, x, and y, represent a direct variation if it can be expressed in the form $y/x=k$ or $y=kx$

step 1

<u>Find the value of k</u>

x=6 when y=42

substitute the values

$y/x=k$ ------> $42/6=k$ -----> $k=7$

The equation is equal to

$y/x=7$ or $y=7x$

step 2

<u>Find y when x=12</u>

substitute the value of x in the equation and solve for y

$y=7(12)=84$

5 0

3 years ago

Need help please answer

leonid [27]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Abel saved 43 more nickels than dimes. After he spent 17 dimes he had twice as many nickels than dimes. How many coins did he ha

Alborosie

Answer:

180 coins

Explanation:

N = number of nickels (no nickels spent)

D = number of dimes initially saved

D' = number of dimes left after spending

1) N = D + 43

2) D' = D - 17

3) N = 2*D' = 2*(D - 17)

Set equations 1) and 3) equal to each other and solve for D:

D + 43 = 2*(D - 17)

D + 43 = 2*D - 34

D = 43 + 34 = 77

N = D + 43 = 77 + 43 = 120 nickels left

D' = D - 17 = 77 - 17 = 60 dimes left

Total coins left = 120 + 60 = 180 coins (I hope this is not too confusing for you)

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2 years ago