Answer:
h = 15 units
Step-by-step explanation:
A = bh
315 = 21h
h = 315/21
h = 15
Answer:
D
Step-by-step explanation:
8x-5x<21-6
x<15÷3
x<5
To do groups of 9, she could make 2 rows of 9. To do 3, she could do 6 rows of 3. Last, to do 6 she could do 3 rows of 6. :)
You can multiply 3 and 6 together then divide the product by 2
(6*3)/2=18/2=9
