Question

Which of the following phrases are expressions?

Choose 3 answers:

Choose 3 answers:


(Choice A)

A

-3−3minus, 3


(Choice B)

B

8+c< 7d8+c<7d8, plus, c, is less than, 7, d


(Choice C)

C

\dfrac{b}{12}=\dfrac{24}{16}

12

b

​

=

16

24

​

start fraction, b, divided by, 12, end fraction, equals, start fraction, 24, divided by, 16, end fraction


(Choice D)

D

2a^82a

8

2, a, start superscript, 8, end superscript


(Choice E)

E

(10+7)(50+1)(10+7)(50+1)

Answer 1

A, D, E

Explanation:

Expression : a phrase that groups together numbers (constant)s, letters (variables) or their combination, connected by mathematical operators (+ - × ÷) to represent the value of something.

• One-sided
• Can be simplified to have a numerical solution
• Combination of terms with operators

Equation : mathematical sentences formed by relating two expressions to each other.

• Two-sided
• Can be solved to verify the equality or to find missing value(s)
• Combination of two expressions with "="

Inequation (inequality) : a pair of expressions with a relational operation between them (not "=").

• Two-sided
• Can be solved to verify the inequality
• Combination of two expressions with <, >, ≤, or ≥

A. expression

B. inequation (inequality)

C. equation

D: expression

E. expression

Answer 2

A, D, E

Explanation:

expressions - numbers, symbols and operators (such as + and ×) grouped together that show the value of something.

Here expressions:

✔A)
`-3` ---- single term monomial expression

B)
`8+c <7d` ----- this is an inequality

C)
`(b)/(12) = (24)/(16)` ------- equation

✔D)
`2a^8` -------- algebraic expression also contains "×"

✔E)
`( 10 + 7 ) ( 50 + 1 )` -------expression containing + and ×