If a car travels at 40km/hr for 4 hours, how much distance has it covered?

Mathematics

2 answers:

Triss [41]3 years ago

7 0

Answer:

160 kilometers

because 40 times 4 is 160.

stepan [7]3 years ago

5 0

Answer:

160 km

Step-by-step explanation:

The speed is equal to x distance over time, so to find distance you would multiply the speed by the time to tell you that 40 km per hour times 4 hours is equal to 160 km after the 4 hour time period.

Or in simpler terms, 40×4=160.

Hope this helped.

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the distance around a track is 400m. if you take 14 laps around the track what is the total distance you walk? use mental math

Olegator [25]

to do it in mental math: you can ignore the zeroes in 400 for now.

4*14 = 4*10 + 4*4 = 40 + 16 = 56

now add the zeroes back on: 5600m

6 0

3 years ago

Read 2 more answers

Kiyo bought a pizza for $12.75 and four medium drinks at Paola’s pizza. Define a variable and write an expression to represent t

Travka [436]

Y = total amount of money spent
x = cost of one drink

So our expression is:
4x + 12.75

4x stands for 4 drinks times x price of one drink
The 12.75 is a one time fee for the pizza, since Kiyo isn't buying multiple pizzas.

The problem also asks us to find the total price, so we write an equation:

$y = 4x + 12.75$
We insert what x is which in this case is $3
$y = 4(3) + 12.75$
Order of Operations tells us to multiply first:
$y = 12 + 12.75$
Now add your values:
$y = 24.75$
Therefore, Kiyo spent a total amount of 24.75 at Paola's pizza.

Let's check our problem just in case:

$24.75 = 4x + 12.75$
Since we now know what y is equal to, we can plug that into our original equation and check just to verify

We should subtract 12. on both sides of the equation because of inverse operations:

$24.75 - 12.75 = 12.75 - 12.75 + 4x$
We are left with:

$12 = 4x$
We divide:
$\frac{12}{4} = \frac{4x}{4}$
Our result is:
$3 = x$
Which checks out because each drink was in fact, $3 dollars as stated in the word problem. Hope that was thorough enough.

4 0

3 years ago

What represents the inverse of the function f(x)=4x

Yuki888 [10]

Answer:

$\frac{x}{4}$