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iogann1982 [59]
2 years ago
12

each table in the library can seat up to 7 people. There are enough tables for 175 in all. How many tables are in the library

Mathematics
1 answer:
RideAnS [48]2 years ago
4 0

Answer: <em>25 tables</em>

<em>This is a simple division problem</em>

<em>First let's take the given value of </em><em>175</em><em> people</em>

<em>Then we will take the value of </em><em>7</em><em> people per table in the library </em>

<em>Now we must divide </em><em>175</em><em> by </em><em>7</em><em> to get our answer </em>

<em />\frac{175}{7} =25

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8 0
3 years ago
We have a jar of coins, all pennies and dimes. All together, we have 309 coins, and the total value of all coins in the jar is $
Vinvika [58]

There are 130 pennies in the jar

Step-by-step explanation:

We have a jar of coins

  • All coins are pennies and dimes
  • There are 309 coins in the jar
  • The total value of all coins in the jar is $ 19.2

We need to find the number of pennies in the jar

Assume that there are p pennies and d dimes in the jar

∵ There are p pennies and d dimes in the jar

∵ There are 309 coins in the jar

∵ All the coins in the jar are pennies and dimes

∴ p + d = 309 ⇒ (1)

∵ The total value of all coins in the jar is $ 19.2

∵ $1 = 100 cents

∴ $19.2 = 19.2 × 100 = 1920 cents

∵ 1 penny = 1 cent

∵ 1 dime = 10 cents

∴ p + 10 d = 1920 ⇒ (2)

Now we have system of equations, we can solve them to find p

∵ p + d = 309 ⇒ (1)

∵ p + 10 d = 1920 ⇒ (2)

- Multiply equation (1) by -10 to eliminate d

∵ (-10)(p) + (-10)(d) = (-10)(309)

∴ -10 p - 10 d = -3090 ⇒ (3)

Add equations (2) , (3)

∴ -9 p = -1170

- Divide both sides by -9

∴ p = 130

There are 130 pennies in the jar

Learn more:

You can learn more about the system of equations in brainly.com/question/3739260

#LearnwithBrainly

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3 years ago
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Step-by-step explanation:

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6 0
3 years ago
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8.12 is the rounded answer

Step-by-step explanation:

\sqrt{66}

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