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3 years ago

How many solutions are there to the following system of equations?

1 answer:

5 0

$4x-14y=6 \\
-2x+7y=-3 \ \ \ |\times 2 \\ \\
4x-14y=6 \\
\underline{-4x+14y=-6} \\
4x-4x-14y+14y=6-6 \\
0=0 \\ always \ true \\ \\
\boxed{\hbox{infinitely many solutions}} \Leftarrow \hbox{answer C}$

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Answer:

Here,

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3 years ago

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A fire department in a rural county reports that its response time to fires is approximatelyNormally distributed with a mean of

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Answer:

Option C) 0.25

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 22 minutes

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3 0

3 years ago

Read 2 more answers

"The sum of 4 and a number, divided by 2 is less than -6."

Ksenya-84 [330]

Answer:

$\frac{4+n}{2} < -6$ , n < -16

Step-by-step explanation:

To write this into an inequality you need to recognize keywords. The first keyword is "sum" this means the two numbers must be added; so the first part of the inequality is 4+n. Then, it says the sum is "divided by" 2; this means both numbers must be put over two like $\frac{4+n}{2}$ . Finally, this is "less than" negative. Therefore, this must be an inequality with a sign opening towards -6. So the final answer is $\frac{4+n}{2} < -6$ .

To solve the inequality isolate the variable. Multiply both sides by 2, so the new inequality is $4+n$ . Next, subtract 4 from both sides. The answer is n < -16.

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3 years ago