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Leni [432]
3 years ago
14

If a= 2b, then a-c= 2b-c?? Which property of equality is being used?

Mathematics
1 answer:
andriy [413]3 years ago
4 0

Answer:

Subtraction Property of Equality

Step-by-step explanation:

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The original price of a pair of headphones is $39.99 before tax. When David bought the headphones they rang up for $31.99 before
aleksley [76]

Answer:

To find the sales tax multiply the purchase price by the sales tax rate. Remember to convert the sales tax rate from a percent to a decimal number. Once the sales tax is calculated, it is added to the purchase price. The result is the total cost—this is what the customer pays.

Step-by-step explanation:

8 0
3 years ago
Find the selling price of a $20 item after a 20% markup.
nevsk [136]

Answer:

$24

Step-by-step explanation:

For a markup, use the formula <em>a = ( 1 + p ) × w. </em>

!!! Remember, <em>a </em>is the selling price, and <em>w </em>is the original price !!!

!!! The <em>p </em>is the percent in decimal form. 20% as a decimal is 0.20 (move the decimal twice to the left) !!!

<em />

Inserting the values, it should look like <em>a = ( 1 + 0.20 ) × 20 </em>

<em>a = 1.20 × 20 </em>

<em>a = 24</em>

<em />

Hence, the new selling price is $24.

Hope this helps! :)

4 0
3 years ago
You need to guess on a multiple-choice question that has four options.
Licemer1 [7]

Answer:

Its a 25% chance you choose the correct answer

Also 1/4 odds

7 0
3 years ago
Read 2 more answers
√70 is between which two numbers on the number line?
Leto [7]

Answer:

C) 8 and 9

Step-by-step explanation:

We know that 70 is between two perfect squares.

The square numbers 64 and 81 can help us solve this question.

64<70<81

We take square root to get:

\sqrt{64}  \:  <  \:  \sqrt{70}  <  \sqrt{81}

We simplify this to get:

8 \:  <  \:  \sqrt{70}  \:  <  \: 9

Therefore √70 is between 8 and 9.

The correct option is C.

6 0
3 years ago
the number of girls and boys in math class totals 27. how many girls are there if the of girls is 3 more than twice the number b
leonid [27]

Answer: 15 girls

Step-by-step explanation:

27 - 3 = 24

24/2 = 12

12 boys

12 + 3 = 15

15 girls

15+ 12 = 27

7 0
3 years ago
Read 2 more answers
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