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alekssr [168]
1 year ago
9

SOMEONE PLS HELP ME ASAP ON THESE QUESTIONS!!!!!!!

Mathematics
1 answer:
Amanda [17]1 year ago
4 0

Answer:

Step-by-step explanation:

7. the median is better than the mean because it isn't influenced by extremely large values. it is generally better to use the median as opposed to the mean for a simple reason: the mean or average is very sensitive to outliers (abnormally low or high values), while the median is much less affected by outliers.

8.

A median chart is a special-purpose variation of the X-bar chart. This chart uses the median instead of the subgroup average to show the system's central location. The median is the middle point when data points are arranged from high to low. The chart shows all the individual readings.

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Mathematicians 4: Who is Who?
larisa86 [58]

Answer:

a. x = -9 or x = -2

b. -5(x - 4)

c. x = -3 or x = 5

d. x = ±7

Step-by-step explanation:

a. First person;

y = x² + 11x + 18

y = x² + 9x + 2x + 18

y = x(x + 9) + 2(x + 9)

y = (x + 9)(x + 2)

y = x = -9 or x = -2

b. Second person;

y = -5x + 20

The common factor is 5.

y = -5(x - 4)

c. Third person;

y = x² - 2x - 15

y = x² - 5x + 3x - 15

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

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

y = x = -3 or x = 5

d. Fourth person;

y = x² - 49

Applying the difference of squares formula;

(a² - b²) = (a - b)(a + b)

y = x² - 49 = x² - 7² = (x - 7)(x + 7)

y = (x - 7)(x + 7)

y = x = ±7

6 0
2 years ago
How old is Michael now?
anyanavicka [17]
Which Michael?? There are many many many Michaels in the world
3 0
3 years ago
Sea un cuadrado de 2 pulgadas de lado uniendo los puntos medios se obtiene otro cuadrado inscrito en el anterior si repetimos es
Ne4ueva [31]

Answer:

1) La serie geométrica formada es

4, 2, 1,..., ∞

2) La suma al infinito de las áreas de los cuadrados es 8 in.²

Step-by-step explanation:

1) El área del primer cuadrado, a₁ = 2² = 4 pulgadas²

El área del siguiente cuadrado, a₂ = (√ (1² + 1²)) ² = (√2) ² = 2 pulg²

El área del siguiente cuadrado, a₃ = ((√ (2) / 2) ² + (√ (2) / 2) ²) = 1 pulg²

Por lo tanto, la razón común, r = a₂ / a₁ = 2/4 = a₃ / a₂ = 1/2

Las áreas de los cuadrados progresivos forman una progresión geométrica como sigue;

4, 4×(1/2), 4 ×(1/2)²,...,4×(1/2)^{\infty}

De donde obtenemos la serie geométrica formada de la siguiente manera;

4, 2, 1,..., ∞

2) La suma de 'n' términos de una progresión geométrica hasta el infinito para -1 <r <1 se da como sigue;

S_{\infty} = \dfrac{a}{1 - r}

Por lo tanto, la suma de las áreas de los cuadrados hasta el infinito se obtiene sustituyendo los valores de 'a' y 'r' en la ecuación anterior de la siguiente manera;

La \ suma \ al \ infinito \ del \ cuadrado \ S_{\infty}  = \dfrac{4 \ in.^2}{1 - \dfrac{1}{2} } = \dfrac{4 \ in.^2}{\left(\dfrac{1}{2} \right)} = 2 \times 4 \ in.^2= 8 \ in.^2

La suma al infinito de las áreas de los cuadrados, S_{\infty} = 8 in.²

7 0
2 years ago
Can the ratio 75 to 90 be simplified? If so, what is the simplified ratio?
Alina [70]
75:90
15:18
5:6 is the simplified of 75:90
  
6 0
3 years ago
How far does a bus travel in 2.5 hours at 65 mph? 26 miles 135 miles 162.5 miles
sashaice [31]

Answer:

Bus travel in 2.5 hour = 162.5 miles .

Step-by-step explanation:

Given : a bus travel at 65 mph.

To find : How far does a bus travel in 2.5 hours.

Solution : We have given

Speed of bus = 65 miles per hour.

Bus travel in 1 hour = 65 miles.

Bus travel in 2.5 hour = 2.5 * 65 miles .

Bus travel in 2.5 hour = 162.5 miles .

Therefore, Bus travel in 2.5 hour = 162.5 miles .

3 0
3 years ago
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