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zalisa [80]
3 years ago
11

Which technique is most appropriate to solve this equation?

Mathematics
1 answer:
Free_Kalibri [48]3 years ago
4 0

quadratic formula

Step-by-step explanation:

x(x-9)+4(x-9)

x²-9x+4x-36

x²-5x-36

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Suppose you received a score of 95 out of 100 on exam 1 . The mean was 79 and the standard deviation was 8 . If your score on ex
Schach [20]

Answer:

You did the same on both exams.

Step-by-step explanation:

To compare both the scores, we need to compute the z scores of both the exams and then compare the values. The formula for z-score is:

<u>Z = (X - μ)/σ</u>

Where X = score obtained

           μ = mean score

           σ = standard deviation

For Exam 1:

Z = (95 - 79)/8

  = 16/8

<u>Z = 2</u>

For Exam 2:

Z = (90 - 60)/15

  = 30/15

<u>Z = 2</u>

<u>The z-scores for both the tests are same hence the third option is correct i.e. </u><u>you did the same on both exams.</u>

8 0
3 years ago
Martina is currently 10 years older than her cousin Joey. In 3 years she will be 3 times as old as Joey. Use this information to
chubhunter [2.5K]

Answer:

m = j + 10

m + 3 = 3x

Step-by-step explanation:


8 0
3 years ago
O triplo de um número, menos 10 é igual ao próprio número mais 70. Qual é esse número?
marin [14]

Answer: 40

Step-by-step explanation:

3x-10=x+70

3x-x=70+10

2x=80

x=8<u>0</u>

    2

x=40

8 0
3 years ago
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Identify the terms and like terms in the question 3n+7-n-3
Temka [501]

Answer:

like terms: (3n,-n),(7,-3)

Step-by-step explanation:

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Wheres the rest of the problem? or is this it?
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