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s2008m [1.1K]
3 years ago
5

If 20 articles cost ? 90, then the cost of 9 articles is ?

Mathematics
1 answer:
lianna [129]3 years ago
6 0

Answer:

40.50

Step-by-step explanation:

90/20 = 4.50

4.50 x 9 = 40.50

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B is
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Simplify the expression 4a ­− 5b −­ 6 + 2b −­ 3a.
uysha [10]

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a-3b-6

Step-by-step explanation:

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4 years ago
r. Yi buys vegetables at a market. He purchases 6 pounds of potatoes, p, and 3 pounds of onions, n, for $18. Onions cost twice a
ad-work [718]

Answer:

  • The equation 2n = p should be 2p = n.
  • The actual cost of the onions is $3.00 per pound.
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Step-by-step explanation:

The wording "onions cost twice as much as potatoes" is understood to mean the cost per pound of onions (n) is equal to two times the cost per pound of potatoes (2p). Then the appropriate equation would be ...

  2p = n

Then the solution is ...

  6p +3(2p) = 18

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__

The equation should be 2p = n; onions cost $3.00 per pound; potatoes cost $1.50 per pound.

5 0
3 years ago
Does anyone know the answer to this (:
Alecsey [184]

Answer:

A. triangle 4 and triangle 3.

Step-by-step explanation:

If you look at triangle 4, you can see that it need to be rotated and reflected.

If you look at triangle 3, you can see that it needs to be reflected.

4 0
4 years ago
Read 2 more answers
Find the equation of a line that is perpendicular to the line y=(1/3)x+4 and contains the point (-9,0)?
torisob [31]

Answer:

y = -3x - 27

Step-by-step explanation:

0 = -3[-9] + b

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* Perpendicular Lines have OPPOSITE MULTIPLICATIVE INVERSE <em>RATE</em><em> </em><em>OF</em><em> </em><em>CHANGES</em><em> </em>[<em>SLOPES</em>]:

⅓ → -3

I am joyous to assist you anytime.

7 0
4 years ago
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