The answer is (-∞.∞).
Draw out a number line. Plot 0 and -4 on the number line.
Shade to the left of x = 0, and have a filled in circle at the endpoint. This is the graph of x≤0
Then graph x ≥−4 by plotting a filled in circle at -4, and shading to the right.
Note how the two graphs overlap to cover the entire real number line
So if we have x≤0 or x≥−4 then we're basically saying x is any real number. To write this in interval notation, we write (−∞,∞)
This is the interval from negative infinity to positive infinity (or just infinity). We exclude each endpoint because we can't actually reach infinity itself. Infinity is not a number. Infinity is a concept
Side note: if you change the "or" to "and", then the solution to x≤0 and x≥−4 would be [-4, 0][−4,0] to indicate the interval from x = -4 to x = 0, including both endpoints. This is the region where the two graphs overlap.
To know more about graphs
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SPJ9
A=14 <span>the number of pounds of apples Angelica bought.</span>
Answer:
x = -1 or x = -3
Step-by-step explanation:
<h3>Let's solve your equation step-by-step.</h3>
<h3>For this equation: a=1, b=4, c=3</h3>
<h3>Step 1: Use quadratic formula with a=1, b=4, c=3.</h3>
Can you include a picture?
