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3 years ago

What is the property of combining negative and positive numbers

Mathematics

1 answer:

vodomira [7]3 years ago

4 0

Answer:

The answer will always be negative

Step-by-step explanation:

The rule is if you multiply positive by positive it will equal positive.

If you multiply negative and negative it will equal positive.

But if you multiply negative and positive it will equal negative.

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Six men completed a task in 24 hrs and 48 min. How long, in hours and minutes, would it take four men to complete the same task?

igor_vitrenko [27]

Answer:

It would take 4 men 37 hrs and 12 mins to complete the same task.

step-by-step explanation:

Let X be the time the four men would use to complete the task.

From the question, 6 men completed a task in 24 hrs and 48 mins

But

$24 \: hrs \: 48 \: mins = 24(60mins) + 48 \: mins=1488 \: mins$

Using ratio and proportion

$6 \: men:1488 \: mins$

$4 men:x\:mins$

if more, less divides and if less, more divides.

4 men required more time to complete the task

Hence:

$x = \frac{6}{4} \times 1488 \: mins$

$x = 2232 \: mins$

x = 37 hrs 12 mins

5 0

3 years ago

R is inversely proportional to A R = 12 when A = 1.5 a) Work out the value of R when A = 5 b) Work out the value of A when R = 9

lapo4ka [179]

Answer:

a) R = 3.6

b) A = 2

Step-by-step explanation:

To find the value, start by modeling the inverse proportionality by using the base equations with the original givens.

y = k/x

12 = k/1.5

18 = k

Now we use that to model the equation

R = 18/A

And we can now use that to solve parts a) and b)

R = 18/A

R = 18/5

R = 3.6

R = 18/A

9 = 18/A

2 = A

5 0

3 years ago

Marta believes that the equation of the line of best fit for the scatterplot below is -

Alexus [3.1K]

Marta’s equation has a positive y-intercept, but the scatterplot shows a negative correlation.

<h3>What is a scatter plot?</h3>

The scatter plot is a manner in which data is presented as dots on a cartesian axes, The line of best fit is a description of the data that is presented in the scatter plot.

Hence, Marta is incorrect because Marta’s equation has a positive y-intercept, but the scatterplot shows a negative correlation.

Missing parts;

Marta believes that the equation of the line of best fit for the scatterplot below is y=-5/9x+23/9. Which statement best summarizes why Marta is likely incorrect?

Marta’s equation has a positive y-intercept, but the scatterplot suggests a negative y-intercept.

Marta’s equation has a positive y-intercept, but the scatterplot shows a negative correlation.

Marta’s equation has a negative slope, but the scatterplot suggests a negative y-intercept.

Marta’s equation has a negative slope, but the scatterplot shows a positive correlation.

Learn more about scatter plot:brainly.com/question/13984412

#SPJ1

7 0

2 years ago

6) BRAINLIEST & 10 + POINTS!

MA_775_DIABLO [31]

Answer:

the height of the building is approximately 134 yards

Step-by-step explanation:

Recall that i order to use the arc-length formula:

$arc\,\,length=R\,\theta$

we know the radius R, but the angle $\theta$ must be given in radians. Then we convert $4.5^o$ to radians, and then use 1700 yards as the radius in the formula.