3 years ago

Simplify (2 (radical 5) - 4) (3 (radical 5) +2)

1 answer:

6 0

$(2 \sqrt{5}-4 )(3 \sqrt{5}+2 )=\\2*3*5+2*2* \sqrt{5} -4*3* \sqrt{5}-4*2= \\ 30+4 \sqrt{5}-12 \sqrt{5}-8= \\ 22-8 \sqrt{5}$

You might be interested in

Adding and Subtracting Positive and Negative Fractions and Decimals. Estimate each problem to check if the students answer is re

AnnyKZ [126]

The answer is 3 1/2 or in decimal form it is 3.5

8 0

3 years ago

Find the flow rate through a tube of radius 6 cm, assuming that the velocity of fluid particles at a distance r cm from the cent

vaieri [72.5K]

Answer:

791.68 cm/s

Step-by-step explanation:

The volume flow rate can be interpreted as the integral of fluid velocity over area

$\dot{V} = \int\limits^6_0 {v(r) 2\pi r} \, dr\\\dot{V} = 2\pi\int\limits^6_0 {(25-r^2)r} \, dr\\\dot{V} = 2\pi\int\limits^6_0 {25r-r^3} \, dr\\\\\dot{V} = 2\pi[12.5r^2 - r^4/4]_0^6\\\dot{V} = 2\pi(12.5*6^2 - 6^4/4 - 12.5*0 - 0)\\\dot{V} = 2\pi*126 = 791.68 cm/s$

7 0

4 years ago

What’s the answer for #11 @HavannaS? Spent 20 min and clueless, thank you!!!!!!

Elis [28]

Angle 2=3, so angle 1=4 because angles ABC & BCD equal 90°. When you add together the angles of a triangle you get 180 and if you could put angle 1 and 4 together it would look like an upward version.

That is the best way I could describe it. Hope that helps.

8 0

3 years ago

Lisa purchases a professional racing bicycle that sells for $3,000, including tax. It requires an 18.5% down payment. How much i

matrenka [14]

Answer: 3,0080

Step-by-step explanation:

3 0

3 years ago

PLEASE HELP ASAP<br> How do you find the total for a purchase if there is sales tax?

qaws [65]

Answer:

Conver the sales tax to a decimal and ad it to 1, then multiple that total to the price of the item. Please mark as breinlest