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Dmitriy789 [7]
3 years ago
14

Can someone please explain to me how to get the answer for the question is the picture? I don't get it at all, and the internet

isn't helping. Please explain the way you got the answer

Mathematics
1 answer:
AlekseyPX3 years ago
5 0

Answer:

The original price of the item is $28.

Step-by-step explanation:

So to find the original price, we have to divide the sale price by the result of one minus the discount in percentage form.

So:

First convert 25% to a decimal, 0.25.

OP(original price) = 21 ÷ 1 - 0.25 =

1 - 0.25 = 0.75

21 ÷ 0.75 = 28.

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Simplify <br><br>show work<br><br>1. √50 + √8<br><br><br>2. 30/√7<br>​
vova2212 [387]

Answer:

1. 7 sqrt(2)

2. (30 sqrt(7))/7

Step-by-step explanation:

Simplify the following:

sqrt(50) + sqrt(8)

sqrt(50) = sqrt(2×5^2) = 5 sqrt(2):

5 sqrt(2) + sqrt(8)

sqrt(8) = sqrt(2^3) = 2 sqrt(2):

5 sqrt(2) + 2 sqrt(2)

5 sqrt(2) + 2 sqrt(2) = 7 sqrt(2):

Answer: 7 sqrt(2)

_____________________________________________

Simplify the following:

30/sqrt(7)

Rationalize the denominator. 30/sqrt(7) = 30/sqrt(7)×(sqrt(7))/(sqrt(7)) = (30 sqrt(7))/7:

Answer: (30 sqrt(7))/7

7 0
4 years ago
Which statement is true? Answer choices are attached.
blondinia [14]

Answer:

B.

Step-by-step explanation:

Vertical angles are an opposite pair of angles created by two intersecting lines. Angles 2 and 5 are a pair of angles, on opposite sides, created by the two intersecting lines w and v. Therefor, angles 2 and 5 are equivalent. B is the answer.

8 0
4 years ago
Which expressions are equivilant to 6^16?
belka [17]

The expressions which are equivalent to 6¹⁶ are

(6^{8}) ^{2}

(6^{-2}) ^{\times -8}

and (6^{-4}) ^{\times -4}

<h3>Equivalent expressions </h3>

From the question, we are to determine which of the given expressions are equivalent to 6¹⁶

From one of the laws of indices, we have that

x^{y\times z} = (x^{y})^{z}

The given expression, 6¹⁶, can be expressed as

6^{8\times 2}

or

6^{-2\times -8}

or

6^{-4\times -4}

Then,

6^{8\times 2}= (6^{8}) ^{2}

6^{-2\times -8}= (6^{-2}) ^{\times -8}

6^{-4\times -4}= (6^{-4}) ^{\times -4}

Hence, the expressions which are equivalent to 6¹⁶ are

(6^{8}) ^{2}

(6^{-2}) ^{\times -8}

and (6^{-4}) ^{\times -4}

Learn more on Equivalent expressions here: brainly.com/question/21643960

#SPJ1

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