3 years ago

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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AYO HELP PLZ THANKS ILY

cluponka [151]

Answer: 6

Step-by-step explanation:

5 0

3 years ago

Granola bars are sold in three packs which cost $2.34. Which equation represents the proportional relationship between b the num

Elena L [17]

Okay gotcha. i missed the three packs info. answer is option C

because 3 choclates cost 2.34 so one will cost 2.34/3 = .78

so cost willbbe given as

c = 0.78b

i missed the "three pack " info in first time. sorry

7 0

4 years ago

Guys please help me on this I’m so stuck

Sergio [31]

Answer:

It is the third option

Step-by-step explanation:

ln(xy)=ln(x)+ln(y)

ln(x/y)=ln(x)−ln(y)

ln(xy)=yln(x)

use these three rules, first separate the fraction out to log( $\log (x^2-6)^4 - \log \sqrt[3]{x^2+8}$ , then take the exponent and root out to make $4\log (x^2-6)- \frac{1}{3} \log x^2+8$