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HACTEHA [7]
3 years ago
14

Which choice is equivalent to the expression √20 + √80

Mathematics
2 answers:
salantis [7]3 years ago
7 0

Answer:

13.41

Step-by-step explanation:

Hope it helps!

Korvikt [17]3 years ago
5 0

Answer:

6\sqrt{5}

Step-by-step explanation:

Using the rule of radicals

\sqrt{a} × \sqrt{b} ⇔ \sqrt{ab}

Simplifying the radicals

\sqrt{20}

= \sqrt{4(5)}

= \sqrt{4} × \sqrt{5} = 2\sqrt{5}

\sqrt{80}

= \sqrt{16(5)}

= \sqrt{16} × \sqrt{5} = 4\sqrt{5}

Then

\sqrt{20} + \sqrt{80}

= 2\sqrt{5} + 4\sqrt{5}

= 6\sqrt{5}

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12 years ago, Catherine deposited $200 in a savings account that pays 7.25% simple interest. What is the balance in Catherine’s
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Step-by-step explanation:

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Owen is an hourly employee, and the line that models his total pay in dollars as it relates to the number of hours he has worked
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Answer:

the answer is A

Step-by-step explanation:


3 0
3 years ago
One number is 4 more than another. the difference between their squares is 64. what are the numbers
lora16 [44]
We have to set up 2 different equations if we are to solve for 2 unknowns.  The first equation is x = y + 4.  One number (x) is (=) 4 more than another (y + 4).  Since we have determined that x is larger (cuz it's 4 more than y), when we set up their difference, we are going to subtract y from x cuz x is bigger.  The second equation then is x^{2} - y^{2} =64.  In our first equation we said that x = y + 4, so let's sub that value in for x in the second equation: (y+4) ^{2} - y^{2} =64.  Expand that binomial to get y^{2} +8y+16- y^{2} =64.  Of course the y squared terms cancel each other out leaving us with 8y + 16 = 64.  Solving for y we get that y = 6.  Subbing 6 in for y in our first equation, x = 6 + 4 tells us that x = 10. Yay!

5 0
3 years ago
HELP ME PLSSS ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Jobisdone [24]

Answer:

The question confused me a bit because of the different numbers.

The answer would be

w(2 * 18), which would be the same as choice a if the numbers weren't different.

Step-by-step explanation:


7 0
3 years ago
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