Graph the line that passes through (5, 5), and is perpendicular to a line whose slope is –2.
1 answer:
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Answer: C) All real values of x such that
In other words, x must be 0 or smaller.
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Explanation:
The reason why is because we must make the stuff under the square root to never be negative. We must make -2x be 0 or larger.
So,
As an example, if x = -2, then -2x = -2(-2) = 4 is positive. Applying the square root to a positive number is valid.
But if x = 5, then -2x = -2*5 = -10 is under the square root, which is not allowed.
Um, ok I'm not entirely sure what number sets you need, but I'll do my best.
Integers: 5, -3, 0, 1, -12
Fractions: 1/2, 4 1/2
Decimals: 14.2, -19.4, 0.125
All of the above can also be considered Rational numbers. Rational numbers are numbers that can be expressed as a fraction. All For example, 14.2 is 14 1/5.
Irrational number:
Pi is irrational. It cannot be expressed as a fraction.