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3 years ago

A stock-car race lasted 2.07 hours. how many seconds did the race last?

Mathematics

1 answer:

kolezko [41]3 years ago

8 0

$2.07 hr x \frac{60 min}{1 hr} x \frac{60 sec}{1 min} = 7452 sec$

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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

Find the value of k

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

Find y when x=10

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

Find the value of k

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

Find y when x=12

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

$y=7(12)=84$

5 0

3 years ago

Describe four different subsets of a real numbers.

Vadim26 [7]

Answer:

Step-by-step explanation:

Natral whole rational irrational

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3 years ago

Given the functions f(x) = − 4x − 1 and g(x) = 2x + 4, which operation results in the smallest coefficient on the x term?

Sedbober [7]

F(x)=-4x-1 if you sub 3 into it you get 3(-4)-1 which is -13 and 2x+4=10

4 0

3 years ago

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I don't know how to do this

vesna_86 [32]

He could have 30 dimes and 13 quartars

7 0

3 years ago

The diagram shows a triangle. What is the value of z?

Damm [24]

Answer:

z=31°

Step-by-step explanation:

32°+117°+z=180°{ sum of angle of triangle}

z=180-149

z=31°

<h2>stay safe healthy and happy.</h2>

6 0

3 years ago

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