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choiboiqg5755
23.10.2019 •
Mathematics
Which of the following is a solution of the inequality 7x + 8 > 20? 70 points and brainliest fast
a. i,iii and ii
b. i and ii
c. ii only
d. ii and iii
Solved
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Ответ:
C. II only
Step-by-step explanation:
7(12/7) + 8 > 20 : 19.97 > 20; wrong
7(2.5) + 8 > 20 : 25.5 >20; right
7(-3) + 8 > 20 : -13 > 20; wrong
Ответ:
Step-by-step explanation:
Given points:
3, 2.25, opposite of 4, -(-1 1/2) ⇒ 3, 2.25, -4, 1 1/2
In ascending order:
-4, 1.5, 2,25, 3
Using o,25 intervals:
-4.00, -3.75, --3.50, -3.25, -3.00, -2.75, -2.50, -2.25, -2.00, -1.75, -1.50, -1.25, -1.00, -0.75, -0.50, -0.25, 0, 0.25, 0.50, 0.75, 1.00, 1.25, 1.50, 1.75, 2.00, 2.25, 2.50, 2.75, 3.00
Plotted tick marks
-4.00, 1.50, 2.25, 3.00
Number of marks
between: -4.00 and 1.50 = 21
between: 1.50 and 2.25 = 2
between: 2.25 and 3.00 = 2