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2 years ago

Why is it a good idea to check to see if your answer is reasonable?

Mathematics

2 answers:

Dahasolnce [82]2 years ago

4 0

Answer:

A. if your answer is reasonable, you have probably done the problem correctly

Step-by-step explanation:

monitta2 years ago

3 0

Answer:

D number option is the correct answer

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A train travels from Washington DC to new york(225 miles). The train departs at 4:55 PM and arrives in New York at 7:55 PM. What

mylen [45]

Answer:

The average speed is:

$\var{v}=75\: miles/h$

Step-by-step explanation:

The average speed equation is given by:

$\var{v}=\frac{\Delta x}{\Delta t}$

Were:

Δx is the displacement (225 miles)
Δt is the change in time (3 hours)

Then we have:

$\var{v}=\frac{225}{3}$

$\var{v}=75\: miles/h$

I hope it helps you!

4 0

2 years ago

Which equation could have been used to create this graph?

Galina-37 [17]

D

Remember starts at zero slope is up 4 right 1
Y= 4/1x+0
Y=4x

8 0

3 years ago

Read 2 more answers

What is the radius and diameter of the following circle

brilliants [131]

Answer:

Radius: 16cm

Diameter: 32cm

Step-by-step explanation: Diameter 2 times the radius. Pls give me brainliest

3 0

3 years ago

Read 2 more answers

It is thought that not as many Americans buy presents to celebrate Valentine's Day anymore. A random sample of 40 Americans yiel

evablogger [386]

Answer:

98% confidence interval of the true proportion of all Americans who celebrate Valentine's Day

(0.3672 , 0.7328)

Step-by-step explanation:

<u><em>Explanation:</em></u>-

Given Random sample size n =40

Sample proportion

$p = \frac{x}{n} = \frac{22}{40} = 0.55$

98% confidence interval of the true proportion of all Americans who celebrate Valentine's Day

$(p-Z_{\alpha } \sqrt{\frac{pq}{n} } , p + Z_{\alpha } \sqrt{\frac{pq}{n} } )$

The Z-value Z₀.₉₈ = Z₀.₀₂ = 2.326

98% confidence interval of the true proportion of all Americans who celebrate Valentine's Day

$(0.55-2.326\sqrt{\frac{0.55 X0.45}{40} } , 0.55 + 2.326\sqrt{\frac{0.55 X0.45}{40} } )$

( 0.55 - 0.1828 , 0.55 + 0.1828)

(0.3672 , 0.7328)

6 0

3 years ago

Read 2 more answers

If 15 litres of paint covers an area of 250 m2, what area (in m2) will 20 litres of paint cover?

Korvikt [17]

Answer: 333.33m²

Step-by-step explanation:

Since we are informed that 15 litres of paint covers an area of 250 m2, the the area that 1 liter of paint will cover will be:

= 250m²/15

= 16.666667m²

Therefore, the area that 20 litres of paint will cover will be:

= 16.666667m² × 20

= 333.33m²

8 0

2 years ago