Answer: 135 minutes
Step-by-step explanation:
45/7= 6.42857142857
6.42857142857 x 21 = 135
2 halves make up one whole
Hope this helps!
Vote my brainliest!
Answer:

Step-by-step explanation:
- t = time (in hours) → this is the independent variable
- s = total area cleaned (in square feet) → this is the dependent variable (as the number of square feet cleaned depends on the number of hours worked)
Therefore, if the rate of cleaning is 8 1/4 square feet per hour, the relationship between s and t is:

The given expression is :
2xx+3-5(x-2)
We know that, 

Aleena expands 2xx+3-5(x-2) as 2x²+3-5x-10. She is mistaken because the sign before 10 should be +10 instead of -10. Hence, the correct expanded form is 2x²+3-5x+10. Hence, this is the required solution.
Answer:
The kiwi is 23 inches tall.
Step-by-step explanation:
63= 2k + 17
46= 2k
k= 23 inches tall