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Paladinen [302]
3 years ago
15

Solve for k: 31 - 3k = 10​

Mathematics
2 answers:
mash [69]3 years ago
8 0

Answer:

k=-7

Step-by-step explanation:

31-3k=10

31-31=0    10-31=-21

-3k=-21     -3/3=0

-21/3=-7

k=-7

Crazy boy [7]3 years ago
5 0

Answer:

k = 7

Step-by-step explanation:

Step 1: Write equation

31 - 3k = 10

Step 2: Solve for <em>k</em>

  1. Subtract 31 on both sides: -3k = -21
  2. Divide both sides by -3: k = 7

Step 3: Check

<em>Plug in k to verify it's a solution.</em>

31 - 3(7) = 10

31 - 21 = 10

10 = 10

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Answer:

a) Surface area = 616 cm²

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Step-by-step explanation:

Surface area and volume of a regular triangular pyramid that has a base edge of 16 cm and a slant height of 15 cm

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Base area = Base edge²

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Sam has $2.25 in quarters and dimes, and the total number of coins is 12. How many quarters and how many dimes?
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-----------

This means that:

n₁ = 12 - n₂

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12*$0.10 - n₂*$0.10 + n₂*$0.25 = $2.25

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$1.20 + n₂*$0.05*3 = $2.25

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Answer:

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