Answer:
Sydney is 44 years old
Step-by-step explanation:
<u>Step 1: Make a system of equations
</u>
d = s - 15
<em>d + s = 73
</em>
<u>Step 2: Plug in s - 15 for d in the second equation and solve
</u>
s - 15 + s = 73
2s - 15 = 73 + 15
2s / 2= 88 / 2
<em>s = 44
</em>
Answer: Sydney is 44 years old
Answer: 
Step-by-step explanation:
Given
The inequality is 
adding both side 7

Multiply both sides by 

the shaded region in the figure indicates the solution set.
the answer it four and one sixths
Answer:
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Step-by-step explanation: