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henrygrubb554
24.01.2020 •
Mathematics
Which of the following is an equivalent form of the compound inequality −22 > −5x − 7 ≥ −3?
a) −5x − 7 < −22 and −5x − 7 ≥ −3
b) −5x − 7 > −22 and −5x − 7 ≥ −3
c) −5x > −22 and −7 ≥ −3
d) −5x − 7 < −22 and −5x − 7 ≤ −3
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Ответ:
Working;
Since the −5x − 7 and −22 have interchanged sides, the inequality sign also changes direction.
For part two, −5x − 7 ≥ −3 remains unchanged.
Ответ:
20°, 40°, 120°
Step-by-step explanation:
We know that all the angles add up to 180°, that's a rule to all triangles. Let's name the first angle a. The ratio turns to a:2a:6a. We need to get the value of a. We can do this by add the a's the the ratio together and dividing that from 180. Or 180/9=a=20. This means that the angles are 20°, 40°, and 120°. To check, we know that if we add the all the angles together, we should get 180°. 20°+40°+120°=180°
We are correct! I hope that helped!