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Drupady [299]
3 years ago
14

Each week, Rosario drives to an ice-skating rink that is 60 miles away. The round-trip takes 2.75 hours. If he averages 55 miles

per hour on his way to the rink, which equation can be used to find x, the number of miles per hour he averages on his way home?
Mathematics
2 answers:
Morgarella [4.7K]3 years ago
6 0

Answer:

\frac{60}{55}+\frac{60}{x}=2.75

Step-by-step explanation:

We know that,

Speed = \frac{Distance}{Time}

\implies Time = \frac{Distance}{Speed}

On his way to the rink,

Distance = 60 miles,

Speed = 55 miles per hours,

Thus, the time taken by him = \frac{60}{55} hours,

While, on his way to the home,

Distance = 60 miles,

Let x be the number of miles per hour he averages on his way home,

So, time taken by him = \frac{60}{x} hours

Thus, the total time taken by him = \frac{60}{55}+\frac{60}{x}

According to the question,

Total time taken by him = 2.75 hours,

\implies \frac{60}{55}+\frac{60}{x}=2.75

Which is the required equation.

sertanlavr [38]3 years ago
5 0

Answer:

60(55)•60x=2.75

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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3 0
2 years ago
Please I need help !!!!!
Mama L [17]
The formula is y=0.5m+20

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Or
Since the x axis is by two, then every two miles you increase by 1 mile. So (0,20); (2,21); (4,22); (6,23); (8,24).

4 0
3 years ago
Peter planted 5/12 of his garden with asparagus and 3/12 with beans.
UkoKoshka [18]
Answer: He has planted 2/3 and there is 1/3 left to plant.

Explanation: You need to add your fractions together, because each of those is a section of the garden and you need the total of how much of the garden he has planted.

This isn’t too difficult because the denominators are the same.

5/12 + 3/12 = 8/12

It is 8/12 because since the denominators are the same, you just need to add the numerators. Imagine you have a pie that’s cut into 12 pieces, and you and your friends take 5, and then your family takes 3. How many or gone now? 8 pieces. From how many pieces? 12 pieces. So 8/12 pieces are gone.

So Peter has planted 8/12 of his garden. This however, can be simplified, because both of those numbers divide by 4.

8/4 = 2
12/4 = 3

So 8 is now 2, and 12 is now 3.

This is now 2/3.

If there is 2/3 gone, you need to figure out how much is left to get you to 1.

In this instance, 1 can be rewritten as 3/3, because 3 divided by 3 is 1.

In order to get from 2/3 to 1, you need to add 1/3, one more third to the two thirds you already have.

This means Peter has 1/3 left to plant.

Hope this helps :)

7 0
3 years ago
Denise bought 116 ounces of beans for a bean dip. She bought both 15-ounce cans and 28-ounce cans, and the total number of cans
Valentin [98]
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7 0
2 years ago
Read 2 more answers
Write the standard form equation of the ellipse shown in the graph, and identify the foci.
vlada-n [284]

Answer option A

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Center of ellipse = (-2,-3)

Vertices are (-2,3)  and (-2,-9)

Co vertices are (-6,-3) and (2,-3)

The distance between center and vertices = 6, so a= 6

The distance between center and covertices = 4 , so b= 4

The general equation of vertical ellipse is

\frac{(x-h)^2}{b^2} + \frac{(y-k)^2}{a^2}=1

(h,k) is the center

we know center is (-2,-3)

h= -2, k = -3 , a= 6  and b = 4

The standard equation  becomes

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\frac{(x+2)^2}{16} + \frac{(y+3)^2}{36}=1

Foci  are (h,k+c)  and (h,k-c)

c=\sqrt{a^2-b^2}

Plug in the a=6  and b=4

c=\sqrt{6^2-4^2}

 c=\sqrt{20}

  c=2\sqrt{5}, we know h=-2  and k=-3

Foci  are   (-2,-3+2\sqrt{5})  and  (-2,-3-2\sqrt{5})

Option A is correct

6 0
3 years ago
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