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3 years ago

Complete the steps to find the value of x. 2x 1289 22 2

Mathematics

1 answer:

Oksanka [162]3 years ago

6 0

Answer:

Step-by-step explanation:

2x = 128

x = 128/2

x = 64

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Janet sees this tag on a $70 hand bag. How much is the new price of the bag?

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3 years ago

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Estimate 874,238 – 228,759 using front-end estimation. (help please!!)

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2 years ago

What is the solution to the equation 1.6m − 4.8 = −1.6m?

Alla [95]

1.6m − 4.8 = −1.6m
- 1.6m -1.6m
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2 years ago

Simplify this equation Thanks a lot!!!

den301095 [7]

Answer:

-1

Step-by-step explanation:

We need to simplify the given expression . The given expression is ,

$\rm\implies ( 2 \sqrt6 +5)^{2n-1} ( 2\sqrt6 - 5)^{2n-1}$

Here we can see that the power of the both exponent is same that is (2n+1) . Recall the property of exponents ,

$\bf\implies a^m \times b^m = (ab)^m$

Using this property , we have ,

$\rm\implies ( 2 \sqrt6 +5)^{2n-1} ( 2\sqrt6 - 5)^{2n-1}$

This can be written as ,

$\rm\implies\{( 2 \sqrt6 +5) ( 2\sqrt6 - 5)\}^{2n-1}$

Simplifying using ( a+b)(a-b) = a² - b² ,

$\rm\implies\{( 2 \sqrt6)^2 -5^2 \}^{2n-1}\\\\\rm\implies ( 24 - 25)^{2n-1}$

Subtracting the numbers inside the brackets ,

$\rm\implies (-1)^{2n - 1 }$

Now we know that every odd number is in the form of 2n -1 , where n is any integer. Therefore , the power is odd .

Since the base is (-1) , for even power it is 1 and for odd power it is -1 . Therefore the final answer is ,

$\rm\implies\boxed{\quad \red{ -1 }\quad }$

Hence the required answer is (-1) .

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3 years ago

Bars of soap come in packages of 2 and packages of 8. The 2-bar pack costs $1.98, and the 8-bar pack costs $8.88. Which is the b

Sunny_sXe [5.5K]

Answer:

the answer is 2-bar pack that costs 1.98, it is 0.99 per bar.

Step-by-step explanation:

divide $1.98 and 2 which comes to $0.99 then divide $8.88 and 8 which comes to $1.11 so 0.99 is cheaper and the better deal

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2 years ago