Acarpenter can install 8 sheets of drywall in 10 minutes. at this rate, how long does it take to install one sheet of drywall? how long will it take the carpenter to install 60 sheets?

a) 1.25 minutes; 1.25 hours
eliminate
b) 1.5 minutes; 1.5 hours
c) 2 minutes; 2 hours
d) 2.5 minutes; 2.5 hours

Answer

Find out the  how long does it take to install one sheet of drywall .

To prove

As given

A carpenter can install 8 sheets of drywall in 10 minutes.

8 sheets = 10 mintues

Now

Time taken for installing one sheets of drywall = 1.25 mintues.

Now Find out how long will it take the carpenter to install 60 sheets .

To prove

As given

A carpenter can install 8 sheets of drywall in 10 minutes.

8 sheets = 10 mintues

Now for 60 sheets.

As 1 hour = 60 mintues

Now convert 75 mintues into the hours.

 Time taken for installing 60 sheets = 1.25 hours.

Therefore the option (A) is correct.

Thus 1.25 minutes take to install one sheet of drywall and 1.25 hours take the carpenter to install 60 sheets .

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".