3. If x = 12 which equation is true? 7.11B A. 3(20 - x) = 48
B. 3(12 - x) = 3
C. 2(x - 3) = 18
D. 5x - 3 = 58

C

Step-by-step explanation:

evaluate each

3(20-12)=48

3(8)=48

24=48 FALSE

3(12-12)=3

3(0)=3

0=3 FALSE

2(12-3)=18

2(9)=18

18=18 TRUE

5(12)-3=58

60-3=58

57=58 FALSE

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:

the smallest possible measurement of the width is 14 feet

step-by-step explanation:

let's assume length of parallelogram is 'l'

width of parallelogram is 'w'

the perimeter of a parallelogram must be no less than 40 feet

so, we get

we are given

length of parallelogram is 6 feet

so,

l=6

we can plug it

now, we can solve for w

subtract both sides by 12

divide both sides by 2

and we get

so,

the smallest possible measurement of the width is 14 feet