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4vir4ik [10]
3 years ago
11

3a + 2b = 17, b = 4a - 30

Mathematics
1 answer:
Agata [3.3K]3 years ago
8 0
Hope it helps !!!!!!

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Tracy bought 2 cans of paint and 7 1/3 pints of special paint additive formulated to reduce mildew. Before painting her house, s
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3 2/3 pint

Step-by-step explanation:

First break down the mixed number to divide (into 7 and 1/3)

7 divided by 2 is 3.5 (Convert 3.5 to sixths)

1/3 divided by two is 1/6

1/6 + 3 3/6= 3 4/6 OR 3 2/3

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3 years ago
Assume that A varies directly with z. If A = 30 when z = 5, find A when z = 9.
pishuonlain [190]
If A varies directly with z, and A is 30 and z is 5, then when z is 1, A is 6.
z: 5 ÷ 5 = 1
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A is 54
6 0
3 years ago
Read 2 more answers
The sum of the interior angles of a polygon with n sides is 1980°. Find n.
natka813 [3]

Answer:

n = 13

Step-by-step explanation:

The sum of the measures of the interior angles of an n-sided polygon is

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(n - 2)180 = 1980

Divide both sides by 180.

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Add 2 to both sides.

n = 13

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3 years ago
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Step-by-step explanation:

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