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3 years ago

Find the price of one pen if six pens cost$48.

Mathematics

2 answers:

8_murik_8 [283]3 years ago

8 0

48/6 = 8
1 pen= 8 dollars

makvit [3.9K]3 years ago

8 0

Answer:

Step-by-step explanation:

If six pens costs $48, then you would do 48/6 which equals to 8.

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Heights of 10-year-olds, regardless of gender, closely follow a normal distribution with a mean of 55 inches and a standard devi

Svetllana [295]

Answer:

Step-by-step explanation:

Given that Heights of 10-year-olds, regardless of gender, closely follow a normal distribution with a mean of 55 inches and a standard deviation of 6 inches.

If X is height then X is N(55,6)

Z score would be $\frac{x-55}{6}$

$a) P(X$

b) $P(60$

c) Tallest 10% z = 1.28

X score = $48+1.28(6) = 55.68$ inches

d) $P(X$

i.e. 16.37% cannot go on this ride.

7 0

2 years ago

Read 2 more answers

Two cars travel along a highway at the same speed.

Mazyrski [523]

Answer:

30 mins

Step-by-step explanation:

<em>speed = distance/ time </em>

speed of car A

= 20/ 12 km/ min

= 5/ 3 km/ min

also, speed of car A = speed of car B

speed of car B = 5/ 3 km/ min = 50km / time taken (in mins)

$\frac{5}{3} = \frac{50}{t}$

$5t = 150$

$t = 30$

=> t = 30 mins

6 0

2 years ago

What are the median mode and range of the data set 16,17,17,17,19,21,23,24

Sav [38]

Mode 17,
Mean is 19.3
Median 18.

3 0

3 years ago

Helena lost her marbles. But then she found them and put them in 4 bags with mm marbles in each bag. She had 3 marbles left over

77julia77 [94]

Answer:

4m +3 marbles does Helena have in all.

Step-by-step explanation:

Here, m represents the marble in each bag.

She put them in 4 bags with m marbles in each bag.

In each bag she have m marbles

then, in 4 bag she have 4m marbles

⇒total number of marbles= 4m

Since, she had 3 marbles left over.

⇒She have total number of marbles = 4m + 3

Therefore, 4m +3 marbles does Helena have in all.

8 0

2 years ago

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Find the dimensions of a rectangle with perimeter 112 m whose area is as large as possible. step 1 if a rectangle has dimensions

Veronika [31]

Please use the solution below:
Let P = perimeter, A = area
As provided above, a = xy and
We know that the formula to solve for the perimeter of a rectangle is P = 2x + 2y. Using the given 112m, we can solve the perimeter using the formula:
112 = 2x + 2y
56 = x + y

x = 56-y or y = 56-x
Let's solve the perimeter in terms of y using the formula below:
A = (56-y)(y)
Find the derivative of A = 56-y^2 to get the value of y.
dA/dy = 56-2y = 0
y = 56/2
y = 28
To find X, substitute the value of y in the equation x = 56 - y.
x = 56 - 28
Therefore, x = 28.
We can conclude that the figure is not a rectangle but a square.

7 0

2 years ago