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3 years ago

9

Simplify the radical: √80

2 answers:

Nastasia [14]3 years ago

7 0

Answer:

4√5

Step-by-step explanation:

if this isnt the answer u needed lmk!!

Evgesh-ka [11]3 years ago

3 0

Rewrite 80 as its prime factor
Square root (2x2)x(2x2)x5

Group the same prime factors into pairs.
(2x2)x(2x2)x5

Rewrite each pair in exponent form.
2(2) x 2(2) x 5

Use this rule: square root of x(2) = x.

(2x2) square 5

Simplify 4 square 5

Decimal form: 8.944272

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Can you help me please help me

pashok25 [27]

Answer:

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4 0

3 years ago

If 3x - 2y = 9 , 27x³- 8y³= 1377 , prove that xy = 4 <br><br><br><br>plzz answer this question...

solniwko [45]

Step-by-step explanation:

Here we are given that , the Value of

$3x - 2y = 9$
$27x^3 - 8y^3 = 1377$

And we need to find the prove that ,

$xy = 4$

We know a identity as ,

$(a-b)^3 = a^3-b^3-3ab(a-b)$

On cubing both sides of the given equation,

$(3x-2y)^3 = 9^3$

Simplify and then substitute ,

$27x^3-8y^3 -3(3x)(2y)(3x-2y ) = 729$

$1377 - 18xy (9) = 729$

$162xy = 1377-729$

$xy =\dfrac{648}{162}$

$xy = 4$

Hence Proved !

8 0

3 years ago

The value of w???????

goldenfox [79]

Answer:

Step-by-step explanation:

The angle bisector of a triangle divides the opposite side in 2 segments that are proportional to the other 2 sides of the triangle. Namely:

$\frac{15}{18}=\frac{w}{30}$ and cross multiply.

18w = 450 so

w = 25

4 0

3 years ago

What is the answer using the majic method of factoring?

NeX [460]

2x² - 15x + 7
(2x - 1)(2x-14)

(2x - 1)(x - 7) x= 1/2 or 7

7 0

3 years ago

A road sign gives drivers information about traffic on busy highways. One sign shows 15 miles in 20 minutes. What is this speed

SIZIF [17.4K]

Answer: Speed in miles per hour is 45 mph.

Step-by-step explanation:

Since we have given that

Distance covered = 15 miles

Time taken to cover the above mentioned distance = 20 minutes

We need to calculate the speed in miles per hour ,

As we know the formula for " Speed " i.e.

$Speed=\frac{Distance}{Time}$

Now, we will put the value of distance and time in the above formula:

$Speed=\frac{15}{20}\times 60\\\\Speed=15\times 3\\\\Speed=45\ mph$

Hence, Speed in miles per hour is 45 mph.

8 0

3 years ago

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