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morpeh [17]
3 years ago
12

The ratio of boys to girls in mr. Chens class is 4 to 5. Which of the following cannot be the total number of students in mr. Ch

ens class: 18,20,27, or 36
Mathematics
1 answer:
Rudiy273 years ago
8 0
It would be 20, because 5 plus 4 is 9 and you can multiply 9 by 2 to get 18, 9 by 3 to get 27, and 9 by 4 to get 36, but you can't multiply anything by 9 to get to 20.
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Given: ABCD is a trapezoid with AB || DC. If m∠A = 125 and m∠B = 99, find m∠C/
Pavlova-9 [17]

Answer:

The measure of angle C is 81\°

Step-by-step explanation:

we know that

If AB || DC

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m -----> supplementary angles by consecutive interior angles

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m

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True [87]

Answer:

Part A

  • C. 7.25

Part B

  • B. Ryan Shafer has been more consistent because his mean absolute deviation is less than Norm Duke’s.

Step-by-step explanation:

<u>Given data:</u>

  • 299, 281, 285, 269, 280, 269, 286, 287
<h3>Part A</h3>

<u>Find the mean of the data above:</u>

  • (299 + 281 + 285 + 269 + 280 + 269 + 286 + 287)/8 = 282

<u>Find absolute deviations, an absolute value of the difference of data and the mean:</u>

  • 299 - 282 = 17 ⇒ 17
  • 281 - 282 = -1 ⇒ 1
  • 285 - 282 = 3 ⇒ 3
  • 269 - 282 = -13 ⇒ 13
  • 280 - 282 = 2 ⇒ 2
  • 269 - 282 = -13 ⇒ 13
  • 286 - 282 = 4 ⇒ 4
  • 287 - 282 = 5  ⇒ 5

<u>Find mean absolute deviation:</u>

  • (17 + 1 + 3 + 13 + 2 + 13 + 4 + 5)/8 = 7.25

Correct choice is C

<h3>Part B</h3>

Less mean absolute deviation is the sign of more consistent data.

Since Ryan Shafer has smaller mean absolute deviation, he has been more consistent 7 < 7.25

Correct choice is B.

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3 years ago
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