For 1. To estimate how many sports cards Alberto had, you would round each number to the nearest ten, so 318 would become 320. 273 would then become 270. You would then add those two and would get 590. So, Alberto had 590 sports cards (estimated). If you were looking for the actual answer (not estimated) , you would get 591.
Answer:

Step-by-step explanation:
From the question we are told that:
Diameter 
Radius 
Igniter distance 
Generally the equation for depth is mathematically given by

Therefore




<span>6x + 10 = 4x -8
6x-4x = -8 - 10
2x = -18
x = -9
answer
</span><span>exactly one solution</span>
Answer:
STOP THE CAPP
Step-by-step explanation:
1+1=21