Answer:
20 and 40
Step-by-step explanation:
20 doubled is 40
The difference is 20
Hope this helps! :)
Answer:
2x+8
Step-by-step explanation:
2 times x = 2x. 2 times 4 = 8.
use a calculator girl u smarter than this
Answer:
d
Step-by-step explanation:
use Pythagoras theorem
that is a²+b²=c²
so 4.5²+b²= 18²
rearrange to b²=18²-4.5²
so you get b=

that is equal to 17.42842506