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svet-max [94.6K]
3 years ago
15

Which expressions are equivalent to 3(x + 3y + 2x − y)?

Mathematics
2 answers:
Irina-Kira [14]3 years ago
8 0
3(x + 3y + 2x − y) = 3(3x + 2y)
= 9x + 6y
See if any of these match an answer option.
VikaD [51]3 years ago
3 0
Use distributive property, and simplify like terms.

   3(x + 3y + 2x - y)
= 3(x) + 3(3y) + 3(2x) + 3(-y)
= 3x + 9y + 6x - 3y
= 9x + 6y

Therefore, 9x + 6y is equal to 3(x + 3y + 2x - y)

Also, 9x + 6y can be factored into 3(3x + 2y).
   3(3x + 2y)
= 3(3x) + 3(2y)
= 9x + 6y

So this pair is equivalent: 3(3x + 2y) and 9x + 6y
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The dishwasher Marlin wants costs $720. This week only, the dishwasher is discounted by 25%. Marlin must pay 6% sales tax. Which
Mkey [24]

Answer:

C, both methods save the same amount of money

Step-by-step explanation:

First, we need to calculate what each answer choice will equal.

For A, it asks us to add the sales tax and then take the discount off. So, to find out what the sales tax is equal to, we multiply 720 x 0.06 (because 6% is equal to 0.06).

720 x 0.06 = 43.2

Add the sales tax to the original amount and you get 763.2.

Now we take the discount, which is 25% or 1/4.

1/4 of 763.2 is 190.8.

Subtract the discount from the price and you get 572.4.

For B, it says to take the discount first and then add the sales tax.

25% = 1/4, so 1/4 of 720 is equal to 180.

Subtract 180 from 720, and you get 540.

Now add the sales tax.

540 x 0.06 = 32.4.

540 + 32.4 = 572.4.

The answer is C, both methods save the same amount of money!

7 0
3 years ago
Hello someone please help me
Naya [18.7K]

Answer:

(2, -8)

Step-by-step explanation:

6 0
3 years ago
Draw segment EF so that is bisects RS. Mark their intersection appoint A
Neko [114]

Step-by-step explanation:

EF is a segment so it's a line with the end points as E and F. Line RS bisects(cuts in half) line EF. Then where the two lines meet is where A is.

Hope this helped.

4 0
3 years ago
a woman put $580 into a savings account for one year the build of interest on the account was 6 and a half percent how much was
vovikov84 [41]
$37.70; $580 x 6.5% x 1 = $37.70
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3 years ago
Mark's school trail is 1,425 km long. Mark needs 2850 steps for this. How many centimeters is his step long? ​
kolezko [41]

Answer:

50 cm

Step-by-step explanation:

Convert 1.425km into cm

1.425 * 1000 * 100 = 142500 cm

Divide the total cm by total no of steps

142500/ 2850 = 50cm

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3 years ago
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