Answer: x=7
ab=21
bc=14
Step-by-step explanation:
ab=3x
bc=2x±7
ac=42
3x±2x±7=42
5x±7=42
5x=42-7
5x=35
to get the value of x you divide 35 by 5x
35÷5x=7
so the value of x is 7
ab=3x
x=7
3x=7×3x
7×3=21
x=7
2x=7×2x
2×7=14
Answer:
Eagle - 0.83%
Sparrow - 4%
Step-by-step explanation:
1. On average, the weight of the eagle is 1.68 kg. Its head weighs 14 g.
Then
1.68 kg = 1,680 g - 100%
14 g - x%
Write a proportion:
Cross multiply:
2. On average, the weight of the sparrow is 25 g. Its head weighs 1 g.
Then
25 g - 100%
1 g - x%
Write a proportion:
Cross multiply:
The represent for that would be 572
0.800 rounded to the nearest tenth is0.8
Since all of these numbers have the same variable they can all be added up to get a sum of 10a which is its simplified form.