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pogonyaev
3 years ago
5

Please answer this for 15 points :) <333

Mathematics
1 answer:
lions [1.4K]3 years ago
3 0

Answer:

A.

Elena can run 3 miles per hour.

Step-by-step explanation:

Given that:

a circular running track = 1/5 mile

On this track, Elena runs completing each of the laps in 1/15 of an hour

We are to find Elena running speed.

It implies that the distance of Elena = \dfrac{1}{5}

Time to run each lap = \dfrac{1}{15} \ of \ an \ hour

Speed is the amount of distance covered in a specified period of time.

Recall that the formula for calculating speed is:

Speed = \dfrac{distance}{time}

Speed = \dfrac{\dfrac{1}{5}}{\dfrac{1}{15}}

Speed ={\dfrac{1}{5}\times \dfrac{15}{1}

Speed =  3miles / hour

As such, Elena can run 3 miles each hour.

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Crazy boy [7]
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3. A
All of theses are true
4 0
3 years ago
Which ones do I select
Natalka [10]

Answer:

8(x) = 56 (x = 7)  (x) + 5 3/4 = 8 3/4 (x = 3) x/2 = 3.5 (x = 7) Neither x - 2.56 = 0.44 (x = 3)

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Help me plz guys for 14 point​
strojnjashka [21]
I think its true, since perimeter is the diatance around. I would say mines correct, but you could try. I hope that helped atleast a little. :)
8 0
3 years ago
What is the equation in vertex form of the quadratic function with a vertex at (-1, -4) that goes through (1, 8)?
cestrela7 [59]

Answer:

y = 3(x+1)^2 - 4

Step-by-step explanation:The general form of the equation of a quadratic function whose vertex is (h,k) and whose leading coefficient is a is:

y - k = a(x-h)^2, or

y      = a(x-h)^2 - k

Substituting the coefficients of the vertex (-1, -4), we get:

y      = a(x + 1)^2 - 4

Substituting the coordinates of the given point, (1,8), we get:

8      = a(1+1)^2 - 4, which simplifies to:

8      = a(2)^2 - 4, or

8  = 4a - 4.  Then 4a = 12, and a = 3.

Thus, the desired equation is y = 3(x+1)^2 - 4 (answer j).


5 0
4 years ago
A packed box that is being shipped will be weighed in order to calculate the correct postage needed. The total weight of a packe
ivolga24 [154]

Answer:

Step-by-step explanation:

Total Weight of the package = weight of product + weight of box

Weight of empty box =0.88lb

Total weight of the box is =7.24lb

Let Weight of product inside box=w

Let wet of empty box =y

Total weight = F

Then,

F=y+w

Since F=7.24lb. y=0.88

Then, w=F-y

w=7.24-0.88

w=6.36lb

The weight of the product is 6.36lb

5 0
3 years ago
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