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pishuonlain [190]
2 years ago
5

Help help help help please this is due soon

Mathematics
2 answers:
IgorLugansk [536]2 years ago
8 0

Answer: (2,-1)

Step-by-step explanation:

Ket [755]2 years ago
7 0

Answer:

  • A'(1, -2)

Step-by-step explanation:

<u>The rule for a rotation by 270° about the origin is:</u>

  • (x, y) → (y, - x)

<u>Apply the rule to the point A, which has coordinates of (2, 1)</u>

  • A(2, 1) → A'(1, -2)
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Population A and Population B both have a mean height of 70.0 inches with an SD of 6.0. A random sample of 50 people is picked f
Alex

Answer:

Sample mean from population A has probably more accurate estimate of its population mean than the sample mean from population B.

Step-by-step explanation:

To yield a more accurate estimate of the population mean, margin of error should be minimized.

margin of error (ME) of the mean can be calculated using the formula

ME=\frac{z*s}{\sqrt{N} } where

  • z is the corresponding statistic in the given confidence level(z-score or t-score)
  • s is the standard deviation of the sample (or of the population if it is known)
  • N is the sample size

for a given confidence level, and the same standard deviation, as the sample size increases, margin of error decreases.

Thus, random sample of 50 people from population A, has smaller margin of error than the sample of 20 people from population B.

Therefore, sample mean from population A has probably more accurate estimate of its population mean than the sample mean from population B.

7 0
3 years ago
What is the answer to this question
Ganezh [65]

Answer:

9v + 14

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Algebra I</u>

  • Terms/Coefficients

Step-by-step explanation:

<u>Step 1: Define</u>

7v + 2 + 12 + 2v

<u>Step 2: Simplify</u>

  1. Combine like terms (v):                    9v + 2 + 12
  2. Combine like terms (Z):                    9v + 14
7 0
3 years ago
O 25<br> о 50<br> о 100<br> X= what
Kruka [31]
What’s the question?
7 0
3 years ago
2(x 4) = 35 − (7 − 4x)
Rus_ich [418]
2(x4) = 35 - (7-4x)
                        +4x
2(x8)= 28
/2         /2
8x = 14

6 0
3 years ago
1. What's 7/8 as a decimal?
denpristay [2]

Answer:

0.875

Step-by-step explanation:

7/8 as a decimal is 0.875. Another was of thinking of this is the number '7' is 87.5 percent of the number '8.

5 0
3 years ago
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