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3 years ago

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

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Length and breadth of a rectangular field is 5 : 3. If the breadth of rectangle is 60m, find the length of the rectangle.

djverab [1.8K]

Answer:

Step-by-step explanation:

Given data

Ratio of length to breadth is 5 : 3

hence in fraction form it is 5/3

the breadth of rectangle is 60m

let the length be x

5/3= x/3

cross multiply we have

5*3= 3x

15= 3x

divide both sides by 3

x= 15/3

x= 5m

Hence the length is 5m

3 0

2 years ago

Pleaseeee help meee i dont understand

prohojiy [21]

-(5y) - y = 18
-6y = 18
y = -3
x = 5(-3)
x = -15
(-15, -3)

5x + 4(-7x - 3) = -35
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-23x = -23
x = 1
y = -7(1) - 3
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2 years ago

Thirty work orders are selected from a filing cabinet containing 500 work order folders by choosing every 15th folder. which sam

Andru [333]

It is Systematic sampling

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3 years ago

Classify each polynomial and determine its degree. the polynomial 3x2 is a with a degree of . the polynomial x2y 3xy2 1 is a wit

Fofino [41]

$\rm 3x^2$ is the polynomial of one variable with second-order and $x^2y+3xy^2+1$ is the polynomial of two variables with third-order

<h3>What is polynomial?</h3>

Polynomial is the combination of variables and constants in a systematic manner with "n" number of power in ascending or descending order.

We have polynomials:

$\rm 3x^2$ and

$x^2y+3xy^2+1$

For $3x^2$

In this polynomial, the number of variables is one and the maximum power of x is 2, therefore:

This is the polynomial of one variable with second order.

In polynomial, $x^2y+3xy^2+1$ there are two variables x and y.

The maximum power of x is 3( x has a power of 2 and y has a power of 1)

This is the polynomial of two variables with third order.

Thus, $\rm 3x^2$ is the polynomial of one variable with second-order and $x^2y+3xy^2+1$ is the polynomial of two variables with third-order.

Learn more about Polynomial here:

brainly.com/question/17822016

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2 years ago

A swimming pool at a park measures 9.75 meters by 7.2 meters.

neonofarm [45]

Answer:

Part a) The area of the swimming pool is $70.2\ m^2$