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olasank [31]
3 years ago
11

How much longer was the world record than Sheila first jump

Mathematics
1 answer:
Nadusha1986 [10]3 years ago
8 0
The answer would be 58
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Mariana averaged 80 on her first three math exams. The first score was 86. The second score was 74. What was the third exam scor
Anna71 [15]

The three scores are 86, 74, and an unknown score x. The average (i.e. the sum divided by how many there are) is 80, so we have

\dfrac{86+74+x}{3}=80

Multiply both sides by 3 and you get

160+x=240

Subtract 160 from both sides to get

x=240-160=80

Note: you could solve this exercise very quickly if you notice that the two numbers, 86 and 74, are symmetrical with respect to 80, which is the average. So, the third number must be the average.

6 0
3 years ago
GUYS I MESSED UP ON THE LAST ONE PLEASE HELP ME AGAIN what algebraic expression represents GK
Zielflug [23.3K]

Answer:

GK = 9x-5

Step-by-step explanation:

GK = GH +HJ + JK

= (GJ - HJ) + (HJ) + (HK - HJ)

= (4x-3-x) + (x) + (6x-2-x)

= 3x-3 + x + 5x-2

= (3x+5x+x)+(-3-2)

GK = 9x-5

7 0
2 years ago
Glen hiked 14 miles in 4 hours. What was his average rate of speed?
Daniel [21]
3.5 miles per hour :) hopefully this helps!
8 0
3 years ago
Hayley is filling a tank with water. She measures the depth, in inches, of the water in the tank at the end of each hour for 8 h
weeeeeb [17]

Answer:

the top left

Step-by-step explanation:

7 0
3 years ago
When we make inferences about the difference of two independent population proportions, what assumptions do we need to make? mar
Elis [28]

When we make inferences about the difference of two independent population proportions, we assume that it is a random sample, and the number of successes and failures are at least 15 in each group.

Two independent proportions tests involve comparing the proportions of two unrelated datasets.

For these two datasets to be regarded as an independent population, the following must be true or assumed to be true

  • The datasets must represent a random sample
  • Each dataset must contain at least 15 successes and failures

Hence, the above highlights are the assumptions of two independent population proportions.

To learn more about independent populations from the given link

brainly.com/question/23989150

#SPJ4

4 0
1 year ago
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