Professor armstrong weighed two pieces of metal for an experiment. the piece of iron weighed 12 1/3 pounds and the piece of aluminum weighed 10 2/3 pounds. how much more did the piece of iron weigh than the piece of aluminum

1  2/3

Step-by-step explanation:

This is simple subtraction.how much more means by what quantity is one greater than the other so we just find the difference.

Solution 1(long method)

we change the figures into improper fractions.

12 1/3 = 37/3

10 2/3 = 32/3

37/3 - 32/3 =5/3

5/3 to proper fraction = 1 2/3

Solution 2( use of a calculator)

12  1/3 - 10 2/3 = 1 2/3

If you need any clarification or more explanation pls do mention at the comment section.I would love to help more.

Hope this helps and if it does pls mark as branliest answer thx

For this case we convert the mixed numbers into fractions:

If we subtract we have to:

IN mixed number

Thus, the piece of iron weighs 1.67 pounds more than that of aluminum.

1.67

b: |12 – x| ≤ 0.25

step-by-step explanation:      

let x be the possible lengths in inches, of the ribbons jaime cut.

we have been given that jaime is cutting strips of ribbon for a project. he tries to cut each piece to be 12 inches long, but sometimes he cuts it too long or too short by as much as 0.25 inch.  

we can represent this information in an inequality as:

by the definition of absolute value function we will get,

upon combining our inequalities we will get,

therefore, the inequality   describes all the possible lengths (x), in inches, of the ribbons jaime cut.

step-by-step explanation: