sl1010
24.06.2019 •
Mathematics
Choose the correct description of the graph of the compound inequality (1 point) x − 3 < −11 or x + 5 greater than or equal to 14. a)a number line with a closed circle on −8, shading to the left, and an open circle on 9, shading to the right b)a number line with an open circle on −8, a closed circle on 9, and shading in between c)a number line with an open circle on −8, shading to the left, and a closed circle on 9, shading to the right d)a number line with a closed circle on −8, an open circle on 9, and shading in between
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Ответ:
C) A number line with an open circle on −8, shading to the left, and a closed circle on 9, shading to the right
Step-by-step explanation:
Given compound inequality,
x − 3 < −11 or x + 5 greater than or equal to 14.
⇒ x − 3 < −11 or x + 5 ≥ 14.
⇒ x < - 11 + 3 or x ≥ 14 - 5
⇒ x < -8 or x ≥ 9
Thus, the possible values of x are all real numbers less than -8 excluding -8 and all real numbers greater than 9 including 9,
That is, x ∈ (-∞, -8 ) ∪ [ 9, ∞ )
In the number line the numbers are arranged in ascending order from left to right also in the interval the excluded number is represented by open circle and included number is represented by closed circle.
Hence, correct option is,
A number line with an open circle on −8, shading to the left, and a closed circle on 9, shading to the right
Ответ:
(a) and (b) are not equivalent
(c) is equivalent
Step-by-step explanation:
Given
See attachment for complete question
Required
Determine an equivalent or nonequivalent expression
We have:
Apply law of indices
This is not equivalent to
We have:
Apply law of indices
This is not equivalent to
We have:
Apply law of indices
Evaluate the numerator
This is an equivalent expression