Answer:
2
Step-by-step explanation:
If he uses 1 hour to practice harmonica, one our on homework, and another hour doing chores. He will be spending twice as much time practicing harmonica and doing homework than he would spend on chores.
Answer:
10
Step-by-step explanation:
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Hello!
Let's begin with question 1, 2a(x) · b(x) = ?
2(3x - 1) ·
· (6x - 2)
Question 2, a(x) + 2b(x) = ?
3x - 1 + 2(
)
Question 3,
= ?

Question 4, 2a(x) + b(x) = ?
2(3x - 1) +
6x - 2 + 
Question 5, a(x) - b(2x) = ?
3x - 1 - 
Using proportions, it is found that the original sample weighed
grams.
- This question is solved by <em>proportions</em>, using a rule of three.
- The weight of 1 batch, in grams, is of
. How much do the sample of 12 batches weigh?
The rule of three is:
1 batch -
grams.
12 batches - x grams
Applying cross multiplication:

Applying scientific notation:

The original sample weighed
grams.
You can learn more about proportions at brainly.com/question/24372153