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2 years ago

Expand and simplify x(x − 3)(x + 5)

Mathematics

1 answer:

konstantin123 [22]2 years ago

6 0

Answer: x³+2x²-15x

Step-by-step explanation:

1. Expand

(x²-3x)(x+5)

2. Use the FOIL method: (a+b)(c+d)=ac+ad+bc+bd

x³+5x²−3x²−15x

3. Collect like terms

x³+(5x²−3x²)−15x

4. Simplify

x³+2x²-15x

Hope this helps, have a BLESSED and wonderful day! ;-)

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Which expression can be used to convert 22 Australian dollars to US dollars

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<h2>Answer</h2>

The expression is

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<h2>Explanation</h2>

Step by step conversion is as following;

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Where,

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So, by rearranging

$1 AUD = 1/1.38 USD$

Then

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3 years ago

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2 years ago

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nydimaria [60]

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Step-by-step explanation:

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3 years ago

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For the first 30 km, the bicyclist rode with a speed of v km/hour. For the remaining 17 km he rode with a speed which was 2 km/h

damaskus [11]

Answer:

t= 2.52 hours

Step-by-step explanation:

It is given that for first 30 km, the speed of bicyclist is v km/hour

time taken to cover first 30 km is given by

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for next 17 km the speed of bicyclist is 2 km/hour greater than his original speed

so the speed to cover next 17 km = v+2

time taken to cover next 17 km is given by

$t_{2} =\frac{17}{v+2}$

now total time t spent by the bicyclist to cover entire trip is given by

$t=t_{1} +t_{2}$

$t=\frac{30}{v} +\frac{17}{v+2}$

now if v=18 , we have

$t=\frac{30}{18} +\frac{17}{20}$

now to add fractions we make the denominator same

Hence we will find the LCM of 18 and 20

LCM of 18 and 20 = 180

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2 years ago

Write the phrase as an algerbraic expression. 4 times the sum of a number and 20

Iteru [2.4K]

4 x (n + 20), pretty simple. :)

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