replace each variable with a number and follow the order of operations

the number in front of the variable

replace each variable with a number and follow the order of operations

The repeated factor of a number in exponential form

a set of whole number and their opposites

Math For Chemistry Quiz 1

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| Written by Bensonfelicia

Bensonfelicia

Community Contributor

Quizzes Created: 1 | Total Attempts: 192

Questions: 10 | Attempts: 192 | Updated: Mar 20, 2023

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1.

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2.

All equations have equal signs
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The statement "All equations have equal signs" is true because an equation is a mathematical statement that shows the equality between two expressions using an equal sign. In an equation, both sides of the equal sign represent the same value or quantity. Without an equal sign, it would not be an equation but rather an expression or inequality. Therefore, the presence of an equal sign is a necessary condition for an equation.

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3.

Evaluate means :
- A.
  
  The number in front of the variable
- B.
  
  replace each variable with a number and follow the order of operations
- C.
  
  The repeated factor of a number in exponential form
- D.
  
  A set of whole number and their opposites
Correct Answer
B. replace each variable with a number and follow the order of operations

Explanation
The term "evaluate" in mathematics refers to the process of substituting variables with specific numbers and performing the necessary operations according to the order of operations. This allows us to find the numerical value of an expression or equation.

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4.

The repeated factor of a number in exponential form?

Correct Answer
base
5.

6 + x/4 = -1
- A.
  
  .8
- B.
  
  -28
- C.
  
  -20
- D.
  
  20
Correct Answer
B. -28

Explanation
To solve the equation 6 + x/4 = -1, we need to isolate the variable x. First, we subtract 6 from both sides to get x/4 = -7. Then, we multiply both sides by 4 to eliminate the fraction, which gives us x = -28. Therefore, the correct answer is -28.

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6.

X + 13 = 25
- A.
  
  38
- B.
  
  12
- C.
  
  -12
- D.
  
  -38
Correct Answer
B. 12

Explanation
The equation X + 13 = 25 can be solved by subtracting 13 from both sides of the equation. This gives us X = 12. Therefore, the correct answer is 12.

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7.

Solve -5 = c/7
- A.
  
  -7/5
- B.
  
  -12
- C.
  
  -5/7
- D.
  
  -35
Correct Answer
D. -35

Explanation
To solve the equation -5 = c/7, we need to isolate the variable c. We can do this by multiplying both sides of the equation by 7, which cancels out the denominator on the right side. This gives us -35 = c. Therefore, the value of c that satisfies the equation is -35.

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8.

The number in front of the variable is the ______

Correct Answer
coefficient

Explanation
The number in front of the variable is referred to as the coefficient. Coefficients are used to multiply the variable in an algebraic expression or equation. They indicate the quantity or scale of the variable's value.

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9.

Solve the following m/4 + 9/8. What is the first step; you must have identical?
- A.
  
  Numerators
- B.
  
  Variables
- C.
  
  Denominators
- D.
  
  Fractions
Correct Answer
C. Denominators

Explanation
To solve the given expression, the first step is to ensure that the denominators of the fractions are identical. This is because when adding or subtracting fractions, the denominators must be the same. In this case, the denominators are "4" and "8". To make them identical, we can find the least common multiple (LCM) of 4 and 8, which is 8. Therefore, the first step is to convert the fraction with a denominator of 4 to an equivalent fraction with a denominator of 8.

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10.

A term without a variable is the coefficient
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
constant

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11.

Meaghan was asked to solve the following 4m + 8 = -27 + 81m. What the second step she should perform?

Correct Answer
combine like terms

Explanation
The second step Meaghan should perform is to combine like terms. In the given equation, 4m and 81m are like terms as they both have the variable m. By combining these terms, Meaghan can simplify the equation and solve for the value of m.

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Math For Chemistry Quiz 1

There is no video available yet, please upload the video

All equations have equal signs

Evaluate means :

The repeated factor of a number in exponential form?

6 + x/4 = -1

X + 13 = 25

Solve -5 = c/7

The number in front of the variable is the ______

Solve the following m/4 + 9/8. What is the first step; you must have identical?

A term without a variable is the coefficient

Meaghan was asked to solve the following 4m + 8 = -27 + 81m. What the second step she should perform?