How many terms are in this expression? 2 + 12a − 7b + 9a + 14 a) 2 b) 3 c) 5 d) 6

C) 5

Step-by-step explanation:

Hi, to answer this question we have to analyze the information given:

2 + 12a − 7b + 9a + 14

In an expression each term is separated by a + sign or a - sign. A term can be a number, a variable, or a term multiplied by a variable or variables.

In this case there are five terms: 2; 12a; 7b; 9a and 14.

So, the correct option is c) 5.

arrange the equations with like terms in columns.

analyze the coefficients of x or y.

add the equations and solve for the remaining variable.

substitute the value into either equation and solve.

check the solution.

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional