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rjkz [21]
3 years ago
15

Give an example of a real-world situation involving two unknown quantities. Then write an algebraic expression to represent the

situation.
Mathematics
2 answers:
Stels [109]3 years ago
7 0

Answer:

t=\frac{15}{s} represents the situation described below.

Step-by-step explanation:

A real-world situation could be

<em>Mary is runs everyday, she runs 15 kilometers per day, if she move at a constant speed, what would be the ratio that represents the time she needs everyday to make 15 kilometers.</em>

<em />

In this example, we have three quantities, distance traveled, speed and time. But, we already now the distance traveled, and we don't know the speed and time Mary uses to make 15 kilometer. We also know that the movement is constant, so it's defined by

s=\frac{d}{t}

Where s is speed, d is distance and t is time. So, if d=15, the ratio that represents time would be

s=\frac{d}{t}\\ t=\frac{d}{s}\\ t=\frac{15}{s}

Therefore, the algebraic expression that represents the hypothetical situation is

t=\frac{15}{s}

Where t is time and s is speed.

RUDIKE [14]3 years ago
3 0
A real world expression would be Toby had makes 3 dollars per hour he wants to buy a ps4 for 40 dollars. he already has 10 dollars. how many hours does he have to work to afford his ps4. 3x+10=40
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3 0
3 years ago
Which expression is equivalent to r to the 9th over r to the 3rd
alisha [4.7K]

Answer:

r^{6}

Step-by-step explanation:

To make this a bit easier to see, we'll expand that expression.

R to the 9th is just r times itself 9 times. R to the third is r times itself 3 times.

(excuse my bad formatting)

<u>The expression:</u>

<u>r • r • r • r • r • r • r • r • r • 1</u>

             r • r • r • 1

Remember, anything and everything has a coefficient or denominator of 1.

So, we can cancel 3 r's from the numerator and denominator.

<u>r • r • r • r • r • r • 1</u>

             1

Simplify....

\frac{1r^{6}}{1}

That just equals r^{6}.

3 0
2 years ago
Write a proportion for the statement.<br> 40 is to 10 as 32 is to 8.
Svetach [21]

Hi! ⋇

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  All proportions have <u>this</u> <u>form</u>:

  \sf{\dfrac{a}{b}=\dfrac{c}{d}}, Where \sf{\dfrac{a}{b}} is equal to \sf{\dfrac{c}{d}}.

 If \sf{\dfrac{a}{b}\neq\dfrac{c}{d}}, it's <u>not</u> a proportion.

_________________________

  Here we have two pairs of numbers:

40,10 and 32,8.

Written As a <u>proportion</u>, they <em>look like</em> :

\sf{\dfrac{40}{10}=\dfrac{32}{8}}

Hope this made sense to you :)

\it{Calligrxphy}

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6 0
1 year ago
Create your own equation chain using these numbers for the variable (a=10) (b=6) (c=18) (d=3)
Orlov [11]

Answer:

b x 5 = 30

Step-by-step explanation:

This is one of the many correct answers. The reason why is because it shows that the variable is correct. And if you didn’t know what the variable was you could just divide 30 / 5.

7 0
3 years ago
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