All categories

1 year ago

A LaDawn buys a ten-pack of gel pens for $7.50. How much did each pen cost?

Mathematics

1 answer:

Ira Lisetskai [31]1 year ago

3 0

Answer: Each pen cost $0.75

Step-by-step explanation:

If A LaDawn buys a pack of 10 gel pens and the total cost is $7.50 then you divide 7.50 by 10.

You might be interested in

What is the completely factored form of x^4+8x^2-9

denis-greek [22]

Remark

You'll see it a whole lot easier if you make a substitution so that it looks like something you have already seen

Solution

let y = x^2

x^4 = x^2 * x^2

x^4 = y * y

x^4 = y^2

Now the expression becomes

y^2 + 8 y - 9 = z

(y + 9)(y - 1) = z

Now put the x^2 back in.

(x^2 + 9) ( x^2 - 1) = z

x^2 - 1 becomes x + 1 and x - 1. At this level x^2 + 9 can't be factored.

Answer

(x^2 + 9) (x + 1)(x - 1)

3 0

2 years ago

Read 2 more answers

The distribution of prices for home sales in a certain New Jersey county is skewed to the right with a mean of $290,000 and a st

I am Lyosha [343]

Answer:

The probability that the mean of the sample is greater than $325,000

$P( X > 3,25,000) = P( Z >2.413) = 0.008$

Step-by-step explanation:

Step(i):-

Given the mean of the Population( )= $290,000

Standard deviation of the Population = $145,000

Given the size of the sample 'n' = 100

Given 'X⁻' be a random variable in Normal distribution

Let X⁻ = 325,000

$Z = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } } = \frac{325000-290000}{\frac{145000}{\sqrt{100} } } = 2.413$

Step(ii):-

The probability that the mean of the sample is greater than $325,000

$P( X > 3,25,000) = P( Z >2.413)$

= 0.5 - A(2.413)

= 0.5 - 0.4920

= 0.008

Final answer:-

The probability that the mean of the sample is greater than $325,000

$P( X > 3,25,000) = P( Z >2.413) = 0.008$

6 0

2 years ago

Which descriptions are true for all isosceles triangles? Select each correct answer. At least two equal sides No equal sides One

const2013 [10]

Answer:

1) At least two equal sides

2) One pair of equal angles

6 0

2 years ago

What is the surface area of the prism

V125BC [204]

Answer:

14 squared

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

Solve the math riddle below

Tju [1.3M]

Answer:

28 eggs

Step-by-step explanation:

It takes a hen and a half to lay an egg and a half in a day and a half - this means it takes 1 hen to lay 1 egg in a day and a half. Therefore, 1 hen will lay 4 eggs in 6 days, and 7 hens will lay 28 eggs in 6 days.

7 0

2 years ago

Read 2 more answers