Hence first mechanic worked for 15 hours and second mechanic worked for 5 hours.
<h3>What is ratio and proportion?</h3>
When comparing two quantities of the same kind, ratio is utilized.
For two numbers, a and b, the ratio formula is written as a: b or a/b.
Two or more ratios are said to be in proportion if they are all equal.
Fractions are the foundation of the concepts of ratio and proportion.
Let x is the number of hours the first mechanic worked and y is the number of hours the second mechanic worked.
∵x+y = 20
x = 20 - y
115x+100y = 2225
115(20-y) + 100y = 2225
2300 - 115y +100y = 2225
15y = 75
y = 5 hours
∴ x = 20-5
x = 15 hours
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Answer:
Step-by-step explanation:
abs(9 - 12) = abs(-3) = 3
abs(-3 + 6) = abs(3) = 3
abs(9 - 12) + abs(-3 + 6) = 3 + 3 = 6
Your answers are fine.
1) Transitive property if a = b and b = c, then a = c. Replace with your letters and is is done.
2) Symmetric property of equality.
If a = b, then b = a.
Uhhhhhhhhhh i don’t really know