the difference between k and 25

What is the difference between an expression and an equation?

An equation has an equal sign, but an expression does not.

An equation has more numbers and an expression has more variables.

An expression always has a higher value for the variable.

Expressions And Equations Quiz

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| By Msmortonoasis

Msmortonoasis

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Quizzes Created: 1 | Total Attempts: 3,120

Questions: 11 | Attempts: 3,133 | Updated: Sep 28, 2023

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Questions and Answers

1.

What does 25k mean?
- A.
  
  25 added to k
- B.
  
  The difference between k and 25
- C.
  
  The product of 25 and k
- D.
  
  The product of 2 and 5 and k
Correct Answer
C. The product of 25 and k

Explanation
The correct answer is "the product of 25 and k". This means that 25k is the result of multiplying 25 and k together.

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0
2.

If m = 17, what is the sum of 5 and m?
- A.
  
  85
- B.
  
  22
- C.
  
  21
- D.
  
  84
Correct Answer
B. 22

Explanation
The question asks for the sum of 5 and m, where m is given as 17. To find the sum, we add 5 and 17, which equals 22. Therefore, the correct answer is 22.

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3.

In an input-output (function) machine, I put in 5 and get 10. I put in 9 and get 14. I put in 13 and get 18. What is the rule?
- A.
  
  Multiply by 2
- B.
  
  Add 2
- C.
  
  Add 4
- D.
  
  Add 5
Correct Answer
D. Add 5

Explanation
The rule for the input-output machine is to add 5 to the input number in order to get the output number. This can be observed by the pattern where each input number is increased by 5 to obtain the corresponding output number.

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4
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4.

Evaluate x + 9.2 = 27.4

Correct Answer
18.2

Explanation
To evaluate the equation x + 9.2 = 27.4, we can start by subtracting 9.2 from both sides of the equation. This will give us x = 18.2. Therefore, the value of x that satisfies the equation is 18.2.

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6
4 5
5.

If e = 2, what is 8 divided by e?
- A.
  
  4
- B.
  
  10
- C.
  
  6
- D.
  
  28
Correct Answer
A. 4

Explanation
If e = 2, then dividing 8 by e would be equivalent to dividing 8 by 2, which equals 4.

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1
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6.

If the rule for the input/output (function) is 25 - g, what is the answer if I put in 19?

Correct Answer
6

Explanation
The given rule states that the output is obtained by subtracting the input value from 25. Therefore, if we input 19 into the function, we subtract 19 from 25, resulting in an output of 6.

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3
4 3
7.

What is the algebraic expression for "a number f decreased by 18"?
- A.
  
  18f
- B.
  
  F + 18
- C.
  
  F - 18
- D.
  
  18 + f
Correct Answer
C. F - 18

Explanation
The algebraic expression for "a number f decreased by 18" is f - 18. This is because when we say "decreased by," it implies subtraction. So, we subtract 18 from the number f to represent the decrease.

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8.

Solve the equation 100p = 500
- A.
  
  50
- B.
  
  P = 50
- C.
  
  5
- D.
  
  P = 5
Correct Answer
D. P = 5

Explanation
The equation is solved by dividing both sides by 100 to isolate the variable p. This results in p = 500/100, which simplifies to p = 5.

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2
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9.

W = 7.8 so what is 29.2 - w ?
- A.
  
  22.4
- B.
  
  22.6
- C.
  
  21.4
- D.
  
  21.6
Correct Answer
C. 21.4

Explanation
The given question asks for the result of subtracting the value of w (7.8) from 29.2. By performing the subtraction, we get 29.2 - 7.8 = 21.4. Therefore, the correct answer is 21.4.

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7
10
10.

What is the difference between an expression and an equation?
- A.
  
  They are the same thing.
- B.
  
  An equation has an equal sign, but an expression does not.
- C.
  
  An equation has more numbers and an expression has more variables.
- D.
  
  An expression always has a higher value for the variable.
Correct Answer
B. An equation has an equal sign, but an expression does not.

Explanation
An equation is a mathematical statement that shows that two expressions are equal, and it is represented by an equal sign. On the other hand, an expression is a mathematical phrase that may contain variables, numbers, and operations, but it does not have an equal sign. Therefore, the correct answer is that an equation has an equal sign, but an expression does not.

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11.

Parents, please type your name and the name of your student. Please type the time your student finished the quiz. Then submit. Thanks, Ms. Morton

Expressions And Equations Quiz

What does 25k mean?

If m = 17, what is the sum of 5 and m?

In an input-output (function) machine, I put in 5 and get 10. I put in 9 and get 14. I put in 13 and get 18. What is the rule?

Evaluate x + 9.2 = 27.4

If e = 2, what is 8 divided by e?

If the rule for the input/output (function) is 25 - g, what is the answer if I put in 19?

What is the algebraic expression for "a number f decreased by 18"?

Solve the equation 100p = 500

W = 7.8 so what is 29.2 - w ?

What is the difference between an expression and an equation?

Parents, please type your name and the name of your student. Please type the time your student finished the quiz. Then submit. Thanks, Ms. Morton