Simplify 3.3√40-4.3√320-3√5

1 answer:

4 0

$\displaystyle\\~~~~3.3\sqrt{40}-4.3\sqrt{320}-3\sqrt{5}=\\\\=3.3\sqrt{4\times10}-4.3\sqrt{64\times5}-3\sqrt{5}=\\\\=3.3\times2\sqrt{10}-4.3\times8\sqrt{5}-3\sqrt{5}=\\\\=6.6\sqrt{10}-34.4\sqrt{5}-3\sqrt{5}=\\\\=\boxed{\bf6.6\sqrt{10}-37.4\sqrt{5}}$

You might be interested in

If a salesperson sells 3/4 of an acre for $80,000, what was the price per square foot rounded to two decimal spaces?

Julli [10]

Now, recalling that for 1 yard, there are 3 feet, therefore $\bf \begin{array}{ll}
yards&feet\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
1yd&3ft\\
(1yd)^2&(3ft)^2\\
yd^2&3^2ft^2\\
&9ft^2
\end{array}$

and keeping in mind that, there are 4840 yd² in 1 acre, then

$\bf \cfrac{\quad \frac{3}{4}~\underline{acre}\quad }{80000~\$}\cdot \cfrac{4840~\underline{yd^2}}{\underline{acre}}\cdot \cfrac{9~ft^2}{\underline{yd^2}}\implies \cfrac{\frac{3}{4}\cdot4840\cdot 9~ft^2}{80000~\$}\implies \cfrac{\frac{130680}{4}}{80000}
\\\\\\
\cfrac{\frac{130680}{4}}{\frac{80000}{1}}\implies \cfrac{130680}{4}\cdot \cfrac{1}{80000}\implies \cfrac{3267}{8000}~\frac{ft^2}{\$}~\approx~ 0.408375 ~\frac{ft^2}{\$}$

5 0

3 years ago

Daniel's gross weekly pay is $882.96. When he gets his first paycheck, Daniel notices that payroll taxes have already been deduc

Ulleksa [173]

Answer: 1) $54.74

2) $12.80

Step-by-step explanation:

6 0

2 years ago

In the phone above^

Taya2010 [7]

Answer:

Step-by-step explanation:

3 0

3 years ago

I need someone who can explain how to do this so I can understand please ASAP!!

Debora [2.8K]

Answer:

Step-by-step explanation:

An area is just a number squared, so we need to find the square root of the area.

Square root of 25 = 5

So each edge is 5 feet.

Hope this helps :)

4 0

2 years ago

The cost of five books is $36.25. What is the unit price?

zimovet [89]

Step-by-step explanation:

Cost of 5 books = $ 36.25

Cost of 1 book = $36.25 / 5 = $ 7.25

The unit price is $ 7.25

Hope it will help :)

7 0

3 years ago

Simplify 3.3√40-4.3√320-3√5​

Simplify 3.3√40-4.3√320-3√5