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1 year ago

How did the temperature change if :

Mathematics

1 answer:

Mkey [24]1 year ago

7 0

<h3>Answer: Net Increase of 26%</h3>

===================================================

Explanation:

If it increases by 5%, then we use the multiplier 1.05

Think of it like saying 100% + 5% = 1 + 0.05 = 1.05

Similarly, an increase of 20% means we involve 1.20

Combine those multipliers to get: 1.05*1.20 = 1.26

This is a net increase of 26%

Interestingly, we get fairly close to 25% which is what many students might go for (since 5 + 20 = 25). This is a beginner's trap.

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An example:

Let's say the temperature is 20 degrees Celsius (68 degrees Fahrenheit)

An increase of 5% means it moves to 1.05*20 = 21 degrees C

A 20% increase means we go to 1.20*21 = 25.2 degrees C

The shortcut would be to do a 26% increase to get 1.26*20 = 25.2 to help confirm we have the correct combined increase.

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guajiro [1.7K]

The difference is 6 because it is what we get when we subtract 8 and 2.

Final answer: 6

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3 years ago

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Len [333]

Answer:

Step-by-step explanation:

Point of intersections of the graph with x-axis are not clear.

Let these points are x = -a, -b and c

Therefore, function representing the graph will be,

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f(0) = p(0 + a)(0 + b)(0 - c) = -6

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3 years ago

How far will a car travel in 2 hours at 20 m/s?

RUDIKE [14]

Use the formula distance = rate x time
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3 years ago

Mr Baffoe's farm is 20 km from his house . He uses his car to travel y km of the distance from his and walks<img src="https://te

Bogdan [553]

Answer:

$y = 15.5$

Step-by-step explanation:

Given

$Total\ Distance = 20km$

$Walks\ Hours= \frac{3}{2}\ hours$

$Walks\ Rate = \frac{3km}{1\ hour}$

Required

Determine the distance (y) covered by his car

First, we calculate the distance walked.

This is calculated as follows;

$Distance = Walk\ Hours * Walk\ Rate$

$Distance = \frac{3}{2}\ hours * \frac{3km}{1\ hour}$

$Distance = \frac{3}{2}* 3km$

$Distance = \frac{3* 3km}{2}$

$Distance = \frac{9km}{2}$

$Distance = 4.5km$

This means that he walked 4.5 km

The total distance can be expressed as a sum of distance covered while walking and distance covered by car.

i.e.

$Walk + Car = Total$

Make Car the subject

$Car = Total - Walk$

This gives

$y = 20 - 4.5$

$y = 15.5$

<em>Hence, his car travelled 15.5km</em>

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2 years ago

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morpeh [17]

= log((x^2/(5(x-1)). the third answer

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3 years ago