Answer:
80
Step-by-step explanation:
10 x 1 = 10
10 x 2 = 20
10 x 3 = 30
When you times any single-digit number with 10 just add a zero at the end of the number :)
If you have any more questions about multiplication you can ask me
Hope this helped ya!

Subtract, not add, -0.72 from both sides.
Answer:
number 5= 2
Step-by-step explanation:
Answer:
31 = 2⁵ -1
31 = 16²- 15²
Step-by-step explanation:
As we know that
2¹=2
2²= 4
2³= 8
2⁴= 16
2⁵=32
So
32 = 2⁵
By subtracting 1 in bot sides
32-1 = 2⁵ -1
31 = 2⁵ -1
So
2⁵ -1 = 31
By comparing with

p= 5
As we know that
15²= 225
16² = 256
16²- 15² = 256-225 = 31
16²- 15² = (16+15)(16-15)
31 = (16+15)(16-15)