Use the image above to solve all 4 parts of the question. part 1 - write janet’s time from race #1 in word form. part 2 - three of janet’s times are equal when you round them to the nearest whole second. which three times? part 3 - put janet’s times in order from fastest to slowest. explain how you know. part 4 - grace won race #4 and set a new school record. her time was 1.8 seconds faster than janet’s time for race #4. what was grace’s time? explain how you know.

Step-by-step explanation:

A)

Janet's took 34.56 seconds to cover 50m freestyle swim.

In words it could be said as: thirty four and fifty six hundredths.

B)  

Race #       Time (in sec.)                time( after roundoff to nearest integer)

  1                34.56                                       35

   2                 35                                           35

    3                34.8                                         35

    4                 34.137                                      34

     5                33.92                                       34

Hence, the first 3 race times were equal after rounding off to nearest integer.

C)

on arranging the time of Janet's from fastest to slowest we get the table as:

Race #                              Time( in sec.)

 5                                        33.92

  4                                        34.137

   1                                        34.56

   3                                        34.8

   2                                          35

since, after decimal we arrange the numbers in order same as we do for the natural numbers.

as in race #5 '33' is the smallest among all hence we keep it in first place.

for race 4,1 and 3 we have the same digit before decimals so now we have to look for the number after decimals.

D)

Janet's time in race #4 was: 34.137 sec.

But Grace was 1.8 seconds faster than Janet.

Hence, Grace time=34.137-1.8=32.337 sec.

answer: 12

step-by-step explanation:

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".