Ask question

Ask question

All categories

evablogger [386]

3 years ago

5

In an all boys school, the nights of the student body are normally distributed with a mean of 71 inches and a standard deviation

of 3 inches. Using the empirical rule, what percentage of the boys are between 65 and 77 inches tall?

1 answer:

schepotkina [342]3 years ago

3 0

The answer is 77inches towards

You might be interested in

Suppose that there are two types of tickets to a show: advance and same-day. The combined cost of one advance ticket and one sam

Serga [27]

Answer:

Price of advance ticket: 15$

Price of same-day ticket: $40

Step-by-step explanation:

Let $y$ be the price of one advance ticket and $x$ the cost of one same day ticket.

We know that the combined cost of one advance ticket and one same-day ticket is $55, so

$y+x=55$ equation (1)

We also know that 20 advance tickets and 35 same-day tickets cost $1700, so

$20y+35x=1700$ equation (2)

Now, let's solve our system of equations step-by-step:

step 1. Solve for $x$ in equation (1)

$y+x=55$

$x=55-y$ equation (3)

step 2. Replace equation (3) in equation (2)

$20y+35x=1700$

$20y+35(55-y)=1700$

$20y+1925-35y=1700$

$-15y=-225$

$y=\frac{-255}{-15}$

$y=15$ equation (4)

step 3. Replace equation (4) in equation (3)

$x=55-y$

$x=55-15$

$x=40$

We can conclude that the price of one advance ticket is $15 and the price of one same-day ticket is $40.

7 0

3 years ago

Evaluate the following.<br> |−9|−|6-11|<br> can u guy's explain how to do it

puteri [66]

$|-9|-|6-11|=\\
9-|-5|=\\
9-5=\\
4$

8 0

4 years ago

I need help with this ASAP and can you explain so i can understand?!

Elanso [62]

Answer:

Adult tickets sold = 225

Student Tickets sold = 375

Step-by-step explanation:

Let:

Adult tickets sold = x

Student Tickets sold = y

Total tickets sold = 600

So, we can write: x+y = 600

Total money collected = 3037.50

Cost of 1 Adult ticket = $6.00

Cost of one Student ticket = $4.50

So, we can write: 6x+4.5y=3037.50

Now, we get a system of equations, that if solved we can find values of x and y

Let:

$x+y = 600--eq(1)\\6x+4.5y=3037.50--eq(2)$

We can solve using substitution method.

Finding value of x from eq(1) and putting it in eq(2)

$We\:have\\x+y=600\\x=600-y$

Put in eq(2)

$6x+4.5y=3037.50\\6(600-y)+4.5y=3037.50\\3600-6y+4.5y=3037.50\\-1.5y=3037.50-3600\\-1.5y=-562.5\\y=\frac{-562.5}{-1.5}\\y=375$

So, we get value of y = 375

Now put value of y in eq(1) to find value of x

$x+y=600\\Put\:y=375\\x+375=600\\x=600-375\\x=225$

So, we get value of x = 225

The Tickets sold will be:

Adult tickets sold = x = 225

Student Tickets sold = y = 375

3 0

3 years ago

Read 2 more answers

Find Y NOW!!! Please

Vladimir79 [104]

Answer:

Y

Step-by-step eon:

6 0

4 years ago

−5(1−5k)−4(2k+5) pleas

Kazeer [188]

Answer:

<h2>33k - 25</h2>

Step-by-step explanation:

-5(1 - 5k) - 4(2k + 5) <em>use distributive property a(b + c) = ab + ac</em>

= (-5)(1) + (-5)(-5k) + (-4)(2k) + (-4)(5)

= -5 + 25k - 8k - 20 <em>combine like terms</em>

= (25k - 8k) + (-5 - 20)

= 33k - 25

5 0

4 years ago