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3 years ago

Is -11.16 a fraction or a mixed number

2 answers:

8 0

Tbh I think -11.16 can be either one because as a fraction it's - 1116/100 and as a mixed number it's- 11, 16/100 but it can also be a decimal glad to help ;)

natita [175]3 years ago

7 0

Neither it is a decimal.

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Dwayne drove 18 miles to the airport to pick up his father and then returned home. On the return trip he was able to drive an av

Nesterboy [21]

Answer:

30 mph

Step-by-step explanation:

Let d = distance (in miles)

Let t = time (in hours)

Let v = average speed driving to the airport (in mph)

⇒ v + 15 = average speed driving from the airport (in mph)

Using: distance = speed x time

$\implies t=\dfrac{d}{v}$

Create two equations for the journey to and from the airport, given that the distance one way is 18 miles:

$\implies t=\dfrac{18}{v} \ \ \textsf{and} \ \ t=\dfrac{18}{v+15}$

We are told that the total driving time is 1 hour, so the sum of these expressions equals 1 hour:

$\implies \dfrac{18}{v} +\dfrac{18}{v+15}=1$

Now all we have to do is solve the equation for v:

$\implies \dfrac{18(v+15)}{v(v+15)} +\dfrac{18v}{v(v+15)}=1$

$\implies \dfrac{18(v+15)+18v}{v(v+15)}=1$

$\implies 18(v+15)+18v=v(v+15)$

$\implies 18v+270+18v=v^2+15v$

$\implies v^2-21v-270=0$

$\implies (v-30)(v+9)=0$

$\implies v=30, v=-9$

As v is positive, v = 30 only

So the average speed driving to the airport was 30 mph

(and the average speed driving from the airport was 45 mph)

8 0

1 year ago

Read 2 more answers

8^2 + b^2 = 10^2 what is b? HELP HELP FAST

vodka [1.7K]

Answer:

Step-by-step explanation:

10^2 - 8^2 = B^2

B = 2

3 0

3 years ago

Read 2 more answers

You are checking in a customer’s bag for a flight out of the country. There is a 50-pound weight limit per bag. The customer’s b

goldenfox [79]

Answer:

21.3188kg or 21.3kg

Step-by-step explanation:

As one kilogram is equal to 2.20462 pounds we can calculate the weight in kilograms by taking 2.20462 / 47 and we get 21.3188kg

4 0

2 years ago

6 people can sit together at 1 rectangular table l. If 2 tables aee placed together, 10 people can sit together. 14 people can s

lesya [120]

Solution:

we are given that

6 people can sit together at 1 rectangular table.

2 tables are placed together, 10 people can sit together.

14 people can sit if three tables are put together.

It mean we get a sequence

6,10,14..........

So its making an arithmetic progression, where

First term $=a=6$

Common difference $=d=10-6=4$

Number of terms=number of table $=100$

As we know the nth term is given by the formula

$t_n=a+(n-1)d\\
\\
\text{Substitute the values}\\
\\
t_{100}=6+(100-1)\times4\\
\\
t_{100}=6+99 \times4\\
\\
t_{100}=6+396=402\\$

Hence 402 people can sit.

4 0

2 years ago

The area of a rectangular vegetable garden is 200ft^2 . The width is 10 ft. What is the lenght of the vegetable garden?

guajiro [1.7K]

The length is 20 ft. 10ft times 20ft = 200ft^2

3 0

3 years ago