3 years ago

A normal distribution has a mean of 50 and a standard deviation of 10. What is

Mathematics

1 answer:

Rudik [331]3 years ago

6 0

Answer:

A normal distribution has a mean of 50 and a standard deviation of 10. What is

the probability of selecting a number between 20 and 60?

You might be interested in

A recipe for banana bread requires 5/8 cups of milk Julio wants to make 2/3 of the recipe how many cups of milk should Julio use

Advocard [28]

- Julio Should use 10/24 or 5/12 Cups Of Milk

3 0

3 years ago

Use completing the square to determine which of the following gives the solutions to 3x2 - 24x + 40 = 28.

jeka94

Answer:

$x=4+2\sqrt{3}$

$x=4-2\sqrt{3}$

Step-by-step explanation:

<u>Completing the square</u>

when $ax^2+bx+c=0$

Given equation:

$3x^2-24x+40=28$

Subtract 40 from both sides:

$\implies 3x^2-24x=-12$

Divide both sides by 3:

$\implies x^2-8x=-4$

Add the square of half the coefficient of $x$ to both sides:

$(\frac{b}{2})^2=(\frac{-8}{2})^2=16$

$\implies x^2-8x+16=-4+16$

Factor the left side and simplify the right side:

$\implies (x-4)^2=12$

Square root both sides:

$\implies x-4=\pm\sqrt{12}$

Add 4 to both sides and simplify the radical:

$\implies x=4\pm\sqrt{4 \cdot 3}$

$\implies x=4\pm\sqrt{4}\sqrt{3}$

$\implies x=4\pm2\sqrt{3}$

5 0

2 years ago

What is 20+1?I really need help.LOL

Sveta_85 [38]

The answer to 20+1

=21

6 0

3 years ago

Read 2 more answers

PLS HELP! DUE IN 30 MINUTES!

gayaneshka [121]

Answer:

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

el precio de la mochila que compró Juan e 18,500 una tienda la ofreció en 2 centenas más qué precio tenía

sweet [91]

Answer:

18,502 no se no entendi muy bien

Step-by-step explanation:

3 0

3 years ago