Determine the best survey question for a population of all cell phones produced by a company.

Mathematics

2 answers:

Neporo4naja [7]3 years ago

8 0

Answer:

How many cells phones do you make every day?

(So then you can see how much lithium batteries they use)

Step-by-step explanation:

Luden [163]3 years ago

7 0

Answer:

Its B. What percentage of cell phones made by the company are defective

Step-by-step explanation:

Edge

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Solve the system by substitution. Check your solution. A minus 1.2 b = negative 3. 0.2 b + 0.6 a = 12 a. (15, 15) c. (13, 12) b.

Mrrafil [7]

Answer:

The answer to the question is -1.32

Step-by-step explanation:

The first step will be to write out the equation that we are working with:

This equation is

$0.2b + 0.6a = 12$

The next step is to write out the values of the figures that we are substituting:

$a = -1.2 b=-3$

Substitution in mathematics can best be understood as "something being used in place of another thing". This means that wherever the first variable appears in an equation, the substituting values will replace it and multiply the number it is attached to.

In this case, we will replace the 'b' and the 'a' with the - 1.2 and - 3 respectively.

$0.2(-3) + 0.6(-1.2) = -1.32$