Jeff traveled at an average speed of 65 miles per hour for 2.5 hours and then traveled at an average speed of 70 miles per hour for 1.5 hours. What was the total distance in miles that Jeff traveled during this time?

267.5 miles

Step-by-step explanation:

We start with the formula for speed:

speed = distance/time

Now we solve it for distance:

distance = speed * time

65 mph for 2.5 hours + 70 mph for 1.5 hours

distance = 65 * 2.5 + 70 * 1.5

distance = 162.5 + 105

distance = 267.5

267.5 miles

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".