1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lunna [17]
3 years ago
8

After running a marathon, Marcel’s heart beat rate was 80 beats in twenty seconds. What was his heart rate for 1 second?

Mathematics
2 answers:
o-na [289]3 years ago
6 0

At 4 beats because 80 divided by 20=4

boyakko [2]3 years ago
5 0

Answer

4 beats

Step-by-step explanation:

80 divided by 20= 4 beats per second

You might be interested in
How do you write 7,870 in scientific notations ?
Nuetrik [128]

Answer:

7.87X10^3

Step-by-step explanation:

^ means to the power of

5 0
2 years ago
The selling price of an item is $600. It is marked down by 10%, but this sale price is still marked up
Lena [83]

Step-by-step explanation:

Sale price

= Marked down by 10% from selling price

= 90% of selling price

= 0.9 * $600

= $540.

Sale price - Cost price

= $540 - $450 = $90.

The markup from cost to sale is $90.

6 0
2 years ago
elise takes 12 minutes to rake up and bag a pile of leaves her sister katherine takes twice as long, how many minutes would it t
Ymorist [56]

Answer:

80 minutes

Step-by-step explanation:

Rate and Time are inverses of each other

First,

Elise Time = 12

and

Katherine Time = 2 * 12 = 24

Their rates would be (inverses):

Elise Rate = 1/12

Katherine Rate = 1/24

Together their rate is 1/12 + 1/24 = 3/24

Now, the inverse of this rate would be the time it takes to complete 1 bag together, that is:

(3/24) ^ -1 = 24/3 = 8 minutes

So, 10 bags would take them:

8 * 10 = 80 minutes

8 0
2 years ago
Why do I think I'm ugly
Tanya [424]

Answer:

Ok listen here

Step-by-step explanation:

You are like the earth.

On the inside is a bright center and lava. When lava comes to the surface as a volcano, many people think it's ugly and dangerous, but other people think that it's beautiful.

We all know that a lot of people think the surface of the earth is ugly, and they have given up hope that people can change it, but the truth is that, the world is beautiful and we can change it.

You are beautiful and the people on your earth are represented as your brain. Your brain needs to tell you to look at yourself and to say that you are beautiful. You can change your mindset to tell you that you don't care what other people say, all that matters is what you say.

Always remember that :)

7 0
2 years ago
Read 2 more answers
A metal alloy that is made up of 15% aluminum is combined with a metal alloy that is 35% aluminum. If the result is 400 kilogram
jeyben [28]
55 kilograms of aluminum and 345 kilograms of the other metals
8 0
3 years ago
Other questions:
  • One side of triangle is 3x -5.. the other side is 19-x and the base is 2x. What is the perimeter of the triangle
    9·1 answer
  • The caplan family was going to New York City to ring in the New Year. 16 family members each paid $341 for their plane ticket to
    10·1 answer
  • How do you do these questions?
    7·1 answer
  • Is there a way to come to the answer that <img src="https://tex.z-dn.net/?f=%5Cfrac%7B4x%2B14%7D%7Bx%2B3%7D" id="TexFormula1" ti
    11·1 answer
  • Is (0,0) a solution to this system? y ≥ x^2 + x - 4, y&gt; x^2 + 2x + 1
    9·2 answers
  • What is the graph to the piecewise defined function g(x) = { x+4, -5&lt;=x&lt;=-1
    13·2 answers
  • Which equation represents a line which is perpendicular to the line y = 5x - 8?
    13·1 answer
  • Which expression is equivalent to a2 + 2a – 8?
    15·1 answer
  • Two lines, a and b, are parallel. If both of the lines are rotated 90' in the same direction and then translated to the right by
    15·2 answers
  • Tell whether the following is geometric or not, if geometric find r
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!