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seraphim [82]
3 years ago
7

A researcher finds that 15% of all commuters in a metropolitan area take the train to work. The researcher polls 250 people in t

he area and asks them whether they take the train to work. What is the number of trials for this binomial experiment?
A.15
B.38
C.250
D.265
Mathematics
1 answer:
Ierofanga [76]3 years ago
8 0
It’s the letter c. 250
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Patricia compró 10 estampillas de correos unas de $3.00 y otras de $1.00. Si pago con $18.00 en total. ¿Cuántas pago por cada un
Ganezh [65]

Answer:

Entonces Patricia necesitara 4 estampas de $3 dolares y 6 estampas de $1 dolar

Step-by-step explanation:

Cuatro estampas de tres dolares cada una es:

3 × 4 = 12

Ahora necesitamos encontrar  cuantas estampas mas Patricia puede comprar. Podemos hacer esto restando 12 a 18, que es el costo total de las estampas menos del valor encontrado

18 - 12 = 6

Ahora sabemos que Patricia necesita 6 dolares de estampas ($1 estampas) para acompletar las 10 estampas  dando un total de $18 dolares.

6 × 1 = 6 < sumar 6 de 12

12 + 6 = 18

Entonces Patricia necesitara 4 estampas de $3 dolares y 6 estampas de $1 dolar

6 0
4 years ago
Simplify. Express your answer as a single fraction in simplest form.<br> x x<br> 5
lbvjy [14]

Answer:

\frac{x}{20}

Step-by-step explanation:

Given

\frac{x}{4} - \frac{x}{5}

The LCM of 4 and 5 is 20

= \frac{5x-4x}{20}

= \frac{x}{20}

5 0
3 years ago
How can we get Equation B from Equation A? A. 5 = -2 (x - 1) B. 5 = -2x + 2 How can we get Equation B from Equation A?
lesya [120]

Answer:

Please check the explanation.

Step-by-step explanation:

<u>Determining equation B from Equation A</u>

Given the equation A

5\:=\:-2\:\left(x\:-\:1\right)

Apply distributive law a\left(b-c\right)=ab-ac

5= -2x+2    which is equation B

Hence, equation B can be obtained by implementing the distributive law operation on equation A.

<u>Determining equation A from Equation B</u>

Given the equation B

5 = -2x + 2

Factor out common term -2 on the right-hand side of the equation

5=-2\left(x-1\right)  which is the equation A

Hence, equation A can be obtained by factoring out the common term -2 on the right-hand side of equation B.

7 0
3 years ago
If f(x) = 2(x − 5), find f(8).
Jet001 [13]

Answer:

6

Step-by-step explanation:

f(x) = 2(x-5)

f(8) = 2(8-5)

  1. parentheses comes first so, 8-5 = 3
  2. 2(3), so multiply and the final answer is 6

f(8) = 6

4 0
3 years ago
Can someone help me please
lana66690 [7]
Polygons's interiro angles make a total of (n-2)*180 degree, n being the number of sides. 
in this case, n=6
(6-2)*180=117+124+102+145+107+x
x=125
4 0
3 years ago
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