Answer:
#2
63 questions correctly
Step-by-step explanation:
I hope this helps
15 questions 8 incorrect
15/8= 1.875
135/1.875= 72 incorrectly
135 questions- 72incorrectly= 63correct questions
I only figured out the answer for the Dorthy question, the answer is 210
If it's just an equation you have to write, then write: t = 0.002n
The weight of each small tables and chairs in the United States is 15lbs and 3.5lbs respectively.
<h3>Simultaneous equation</h3>
Let
- Weight of tables = x
- Weight of chairs = y
- Cost of 3 tables and 5 chairs is 62.5lbs
- Cost of 3 tables and 2 chairs is 52lbs
3x + 5y = 62.5
3x + 2y = 52
- Subtract the equation to eliminate x
5y - 2y = 62.5 - 52
3y = 10.5
y = 10.5/3
y = 3.5 lbs
Substitute y = 3.5 into
3x + 2y = 52
3x + 2(3.5) = 52
3x + 7 = 52
3x = 52 - 7
3x = 45
x = 45/3
x = 15 lbs
Therefore, the weight of each small tables and chairs in the United States is 15lbs and 3.5lbs respectively.
Learn more about simultaneous equation:
brainly.com/question/16863577
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