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xxTIMURxx [149]
3 years ago
6

Brad and Tom are comparing their classes scores on a math test . Both of their classes had mean scores of 80 on the test , but B

rad ' s class had a range of 6 while Tom's class had a range of 30. if the highest possible score was 100, which class had the LOWEST score in it?
a) Brads class had the lowest score in it.
b) Tom's class had the lowest score in it.
c) The lowest score occurred in both classes .
d) it cannot be determined from the information .
Mathematics
2 answers:
scoundrel [369]3 years ago
5 0
The answer would be B I think
Because the range is higher than Brads class meaning there is a worse score in Toms class
Amanda [17]3 years ago
3 0

Answer:

The answer is B!!!!! HOPE I HELPED!!!!!!

Step-by-step explanation:

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4 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

8 0
3 years ago
Greatest president ~ A Gallup Poll of American adults in February 2009 asked the following question. "Which of the following pre
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Answer:

The sample proportion is 0.19815

Step-by-step explanation:

A confidence interval has two bounds, a lower bound and an upper bound. The sample proportion is the halfway point between these two bounds, that is, the sum of the bounds divided by 2.

In this problem, we have that:

Lower bound: 0.1759

Upper bound: 0.2204

Sample proportion:

(0.1759 + 0.2204)/2 = 0.19815

The sample proportion is 0.19815

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notka56 [123]

Answer:

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Step-by-step explanation:

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