Answer:
320 crayons per class
Step-by-step explanation:
the school bought 25 boxes...each containing 64 crayons.....so that a total of (25 * 64) = 1600 crayons.
so 1600 crayons and it has to be split equally 5 ways...
1600 / 5 = 320 crayons per class
To determine the number of days, we need to set up equations relating the given values above. The total distance that Kayla would want to travel is a sum of the total distance she traveled from running and the total distance she traveled from biking. So,
200 miles = (6 miles/day) x + (10 miles/day) y
where x is the number of days she spent running and y is the number of days she spent biking.
If the minimum days she used for biking would be 15 days or y = 15, then
200 miles = (6 miles/day) x + (10 miles/day) (15 days)
Solving for x,
200 = 6x + 150
50 = 6x
x = 8.3333 days
Total number of days = 15 days for biking + 8.3333 days for running = 23.3333 days or about 24 days.
6.9 x 100 = 690
6 x 100 = 600
0.9 x 100 = 90
600 + 90 = 690
Answers:
1) 
2) 
3) 
4) 
5) 
Step-by-step explanation:
1) 
Rewriting the expression:

Multiplying the exponents:

Simplifying:

2) 
Rewriting the expression:

Multiplying the exponents:

Simplifying:

3) 
Rewriting the expression:

Since
:

4) 
Multiplying numerator and denominator by
:

Simplifying:

5) 
Rewriting the expression:

Simplifying:

Since we do not want the square root in the denominator, we can multiply numerator and denominator by
:

Finally:

Answer:
the greatest common multiple of 14 and 21 is 7.