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astra-53 [7]
2 years ago
9

Write an expression to represent:

Mathematics
1 answer:
vagabundo [1.1K]2 years ago
8 0

Answer:

Step-by-step explanation:

2/x-5

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In what form is an equation that relates two proportional quantities x and y? Explain your thinking.
Ksju [112]

Answer:

A proportional relationship exists between two values x and y when they can be expressed in the general form.       Hope this helps

Step-by-step explanation:

7 0
3 years ago
A drawer contains quarters and nickels. There are 200 total coins valuing $30.00. Think about a system of equations that can be
Margaret [11]

Answer:

100

Step-by-step explanation:

Let n and q represent the numbers of nickels and quarters, respectively. A suitable system of equations is ...

  n + q = 200 . . . . . . there are 200 coins in the drawer

  5n +25q = 3000 . . .their value is $30.00

For mixture problems like this, it is often a good idea to substitute for the variable representing the contributor of lower value. That is, we want to write an expression for n that we can use for substitution.

Using the first equation to solve for n, ...

  n = 200 - q

Substituting this into the second equation gives ...

  5(200 -q) +25q = 3000

  1000 +20q = 3000 . . . . . . simplify

  20q = 2000 . . . . . . . . . . . . subtract 1000

  q = 100 . . . . . . . . . . . . . . . . divide by 20

  n = 200 -q = 100 . . . . . . . . the number of nickels, as we want

_____

<em>Comment on the solution</em>

We solved for q, then had to do an extra step to find the value of n that the problem asks for. Had we written q = 200-n and used that for substitution, we would have ended with the equation -20n = -2000. This would give the answer for n directly (with no additional steps required).

Sometimes working with negative numbers is uncomfortable or results in errors, so we chose to use the solution method that would avoid negative numbers.

___

<em>Comment on the problem statement</em>

We are told about coins in a <u>drawer</u>, and we are asked about coins in a <u>jar</u>. There is not enough information to answer the question asked. We have had to assume that both refer to the same quantity of coins—an assumption that is not supported by anything in the problem statement.

8 0
3 years ago
Read 2 more answers
Pls slove this asap, i rlly nneed it
butalik [34]

Answer:

Each box is 15.99

Step-by-step explanation:

Just the divide the total cost by 6

3 0
2 years ago
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What is the volume of the following rectangular prism pls help me I’m being timed
alina1380 [7]

Answer:

ummmmm I guess I could add the dimensions in the text.

Step-by-step explanation:

The picture is a black screen.

8 0
2 years ago
What is the difference between a day and a line segment
zepelin [54]

Hello!

I do believe you meant to say:

"What is the difference between a <em>ray</em> and a line segment?"

The difference between a ray and a line segment is:

A ray has one endpoint and continues in one direction. a ray is infinite

A line segment has two endpoints. a line segment is finite

I hope this helps, and have a nice day!

5 0
2 years ago
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