Answer:
10
Step-by-step explanation:
Split 15 into 3 parts, and you get 5 in each group. Take 2 groups with 5 each and add them. you get 10
He can make 15 chess boards.
All you need to do is multiply 3 by 5.
Answer:
1.375
Step-by-step explanation:
3/4 is 0.75,
5/8 is 0.625
so 0.75 + 0.625=1.375
Answer:
Step-by-step explanation:
x²+x²=9²
2x²=81
x²=81/2=(81×2)/4
x=9√2/2≈4.5√2≈6.36
9.
x²+x²=11²
2x²=11²
x²=11²/2
x=11/√2=11√2/2≈7.78
