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jarptica [38.1K]
3 years ago
6

What must be true of two rational expressions before they can be added

Mathematics
1 answer:
Kisachek [45]3 years ago
4 0

Answer:

reeee

Step-by-step explanation:

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The sum of the present ages of the mother and her daughter is 80 years. The mother was thrice as old as her daughter when she wa
Alika [10]

Answer:

let the daughter age be x

let mother age be 3x

Step-by-step explanation:

x+3x= 80

4x = 80

x= 80\4

x=20

daughter age is 20

mather age= 80 -20

= 60

daughter age 20

mother age 60

7 0
3 years ago
How do you simplify this expression
raketka [301]
Convert <span>6\frac{3}{8}<span>6<span><span>​8</span>​<span>​3</span><span>​​</span></span></span></span><span> to improper fraction. Use this rule: </span><span>a \frac{b}{c}=\frac{ac+b}{c}<span>a<span><span>​c</span>​<span>​b</span><span>​​</span></span>=<span><span>​c</span>​<span>​<span>ac+b</span></span>​​:</span></span></span>
​∣8<span><span>​<span>​<span>6×8+3</span></span><span>​​</span></span>−2∣+∣−8<span><span>​8</span>​<span>​5</span><span>​​</span></span>−1<span>∣


</span></span>Simplify <span>6\times 8<span>6×8</span></span><span> to </span>48: <span><span><span><span><span>
​</span>8</span>​<span>​<span>48+3</span></span><span>​​</span></span>−2∣+∣−8<span><span>​8</span>​<span>​5</span><span>​​</span></span>−1∣


</span>Simplify <span>48+3<span>48+3</span></span><span> to </span>51:</span><span><span><span><span><span>
​</span>8</span>​<span>​<span>51</span></span><span>​​</span></span>−2∣+∣−8<span><span>​8</span>​<span>​5</span><span>​​</span></span>−1∣

</span> Make the denominators the same:
<span><span><span>51</span><span>​​/8</span></span>−2×<span><span>​8</span>​<span>​8</span><span>​​

</span></span></span><span>Simplify. Denominators are now the same:
</span>
<span><span><span>51</span><span>​​/8</span></span>−<span><span>​8</span>​<span>​<span>16</span></span><span>​​
</span>
</span></span>Join the denominators: \frac{51-16}{8}<span><span>​8</span>​<span>​<span>51−16</span></span><span>​​
</span>
etc.. and your answer will be 14

</span></span>
3 0
3 years ago
For which of the following situations would a sample be used versus a population? Select all that apply.
muminat

Answer:

Step-by-step explanation:

A biologist is interested in the average wingspan of hawks in the United States.

and

A researcher is interested in the average birth weight of newborn babies born in the United States.

8 0
3 years ago
you sell T-shirts for a fundraiser. it cost $112 to have the T-shirts made. you make a $98 in sales. what is your profit?
Alik [6]

You have no profit.  You have raised no funds, and lost $14.

7 0
3 years ago
The shape made when a solid is cut through parallel to the base is called a ____________.
Nastasia [14]

Answer:

Whatever the base of the shape is, that's the answer

Step-by-step explanation:

For example: a triangular prism cut through parallel to the base would be a triangle

6 0
2 years ago
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