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3 years ago

a toy store marks up every toy by 15% in january. how much does a toy cost during January? use p for the price in December

Mathematics

1 answer:

rjkz [21]3 years ago

8 0

Answer:

D 1.15p

Step-by-step explanation:

Since the price is marked up 15%, you add 15% to the original price, which is p.

15% = .15

p = 1p

1p + .15p = 1.15 p

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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

2 years ago

Read 2 more answers

Brainliest please help!

Dmitriy789 [7]

Answer:

120

Step-by-step explanation:

6 x 6 = 36

6 x 7 = 42

42/2 = 21

21 x 4 = 84

84 + 36 = 120

4 0

3 years ago

The area of a square tile is 49 square inches. Write the length of one side of the square time as a square root and standard fro

aleksandr82 [10.1K]

A square area=legnth times width
but for a square, legnth=width so
area=legnth^2

are=49
49=legnth^2

square root of both sides
7=legnth
the answer is 7

7 0

3 years ago

Convert 67 in base 10 to a number in base 2

MariettaO [177]

Answer:

Step-by-step explanation:

Hope this helps u !!

8 0

3 years ago

M = - 3 M = -1 M = 1 M = 3 I’m giving out brainlest to whoever helps me

ASHA 777 [7]

Answer:

I would say 3.

Step-by-step explanation:

I would say 3 because if you look at the graph, it goes: 0, 1, 2, 4, 5. Your missing 3. So, I would say 3.

4 0

3 years ago