Objective 2.1 8. Chuck cut an entire length of rope into 28 pieces,
each 1 1/2 feet (ft) long. What was the length of the
rope before Chuck cut it?
A 14 ft
B 21 ft
C 32 ft
D 42 ft​

we need the options

step-by-step explanation:

the answer is actually 18%

the answer:

rolling a number cube twice

choosing a meal/drink combination

flipping a coin four times

i know because i just submitted my test and got everyone correct.

presumably all methods would give the same solution; for each choice we just try x=-4, y=2 and see if it checks.

a.

3x+13y=3(-4)+13(2)=-12 + 26 = 14   that checks

6x+11y=6(-4)+11(2)=-24 + 22 = -2 that checks too

b.  

4x + 5y =4(-4)+5(2)=-16 + 10 = 6   nope

c.

5x+4y = 5(-4)+4(2)=-20 + 8= -12 nope

d.

10x+3y = 10(-4)+3(2)=-40 + 6 = -34 nope

answer: a (the first one) is correct