Answer:
D) 40
Step-by-step explanation:
triangles equal to 180 degrees
2x+10+x+50=180
3x+60=180
3x=120
x=40
The answer of that is called a compatible number. I hope this helps! :)
Answer:
There are 5 black counters in the bag.
Step-by-step explanation:
15 green counters in the bag
The proportion of green counters is given by:

So, we have that, the total is x. So


There are 30 total counters.
How many black counters are in the bag ?
A sixth of the counters are black. So

There are 5 black counters in the bag.
Answer:
72x5 = 360 total amount
Step-by-step explanation:
My guess would be: 3 x(times) 500+80+4