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Shalnov [3]
2 years ago
6

−7x−50≤−1 AND−6x+70>−2

Mathematics
1 answer:
fgiga [73]2 years ago
7 0

Answer:

-7\geq x and [-7,12) in interval notation.

Step-by-step explanation:

We have been given a compound inequality -7x-50\leq -1\text{ and }-6x+70>-2. We are supposed to find the solution of our given inequality.

First of all, we will solve both inequalities separately, then we will combine both solution merging overlapping intervals.

-7x-50\leq -1

-7x-50+50\leq -1+50

-7x\leq 49

Dividing by negative number, flip the inequality sign:

\frac{-7x}{-7}\geq \frac{49}{-7}

x\geq -7

-6x+70>-2

-6x+70-70>-2-70

-6x>-72

Dividing by negative number, flip the inequality sign:

\frac{-6x}{-6}

x

Upon merging both intervals, we will get:

-7\geq x

Therefore, the solution for our given inequality would be -7\geq x and [-7,12) in interval notation.

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Answer:

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Step-by-step explanation:

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We simplify the parenthesis to get:

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Therefore the decrease by 15% every time x increases by 1 is

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2 years ago
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Answer:

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Step-by-step explanation:

Part 1:

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So, in this case we can form 4 subgroups with 10 participants each one, replacing the values of:

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Part 2:

The number of ways in which we can choose k element for a group of n elements and the order in which they are chose matters is calculate with permutation as:

nPk = \frac{ n!}{(n-k)!}

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