Ask question

Ask question

All categories

3 years ago

9

Melissa went to staples and bought a book for $5 and four erasers. write an equation to represent the amount of money in spent o

n the book and erasers

1 answer:

alukav5142 [94]3 years ago

5 0

5 x $1 = $5
Hope this helps.

You might be interested in

Which of these is a correct expansion of (3x -2)(2x^2+5)

labwork [276]

(3x−2)(2x^2+5)

=(3x+−2)(2x^2+5)

=(3x)(2x^2)+(3x)(5)+(−2)(2x^2)+(−2)(5)

=6x^3+15x−4x^2−10

=6x^3−4x^2+15x−10

4 0

4 years ago

Read 2 more answers

F the base is 4, what is the value if the exponent is 2? What if the exponent is -2?

nasty-shy [4]

Answer:

Step-by-step explanation:

value of 4, and you want to square it or exponent 2

so 4^2 = 4x4

=16

What is ^-2

It does the same operation however because to is negative it really means putting 4 in the denominator so 2 becomes positive. Inverse of the exponent 2

1/4^2 is the same as 4^-2

which will both give 1/16

5 0

3 years ago

What is the mean of 25, 15, 18, 20, 87, 13, 18, 8, 22, 14

beks73 [17]

24. To find the mean add all of the numbers and divide the sum by the number of digits you added. Meaning that you would add 25, 15, 18, 20, 87, 13, 8, 22, and 14 which is 240 and divide that by 10 since there are 10 numbers. Hope that this helped, have a blessed day :)

3 0

3 years ago

Read 2 more answers

Write an augmented matrix of each system. Then, solve each system using matrix notation. Describe the solution set in vector not

Naddik [55]

Answer:

The answer is below

Step-by-step explanation:

Given the system of equations:

x + y + 2z = 9

2x + 4y - 3z = 1

3x + 6y - 5z = 0

This system of equation can be solved using matrix. This done by first representing the equations as matrix and then solving:

The matrix form is:

$\left[\begin{array}{ccc}1&1&2\\2&4&-3\\3&6&-5\end{array}\right] \left[\begin{array}{c}x\\y\\z\end{array}\right] = \left[\begin{array}{c}9\\1\\0\end{array}\right] \\\\\\ \left[\begin{array}{c}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}1&1&2\\2&4&-3\\3&6&-5\end{array}\right] ^{-1} \left[\begin{array}{c}9\\1\\0\end{array}\right] \\\\\\$

$\left[\begin{array}{c}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}2&-17&11\\-1&11&-7\\0&3&-2\end{array}\right] \left[\begin{array}{c}9\\1\\0\end{array}\right] \\\\\\ \left[\begin{array}{c}x\\y\\z\end{array}\right] =\left[\begin{array}{c}1\\2\\3\end{array}\right]$

5 0

3 years ago

Martene got a small aquarium for her birthday. The aquarium is a right rectangular prism 18.5\,\text{cm}18.5cm18, point, 5, spac

MariettaO [177]

Answer:

14 cm.

Step-by-step explanation:

We have been given that an aquarium is a right rectangular prism 18.5 cm long and 15 cm wide. We are also told that Martene put 3885 cubic cm of water in the aquarium.

To find the depth or height of aquarium, we will use volume of rectangular prism formula.

$\text{Volume of rectangular prism}=l*w*h$ , where,

l = Length of prism,

w = Width of prism,

h = Height of prism.

Upon substituting our given values in above formula we will get,

$3885\text{ cm}^3=18.5\text{ cm}\times 15\text{ cm}\times h$

$3885\text{ cm}^3=277.5\text{ cm}^2\times h$

$\frac{3885\text{ cm}^3}{277.5\text{ cm}^2}=\frac{277.5\text{ cm}^2\times h}{277.5\text{ cm}^2}$

$14\text{ cm}=h$

Therefore, the aquarium is 14 cm deep.

7 0

3 years ago