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josephrosanne18
03.02.2021 •
Mathematics
For each question, choose Yes or No to tell if the expressions are equivalent. Show all work and steps.
7.4 x (12.5 - 8.4) and 7.4 x 4.1
(24 - 1.6) ÷ 3.2 and 6.4 ÷ 3.2
(7.4 + 12.5) - 8.4 and 7.4 + 4.1
8 x 2.5 - 3.2 and 20 + 4.1
Solved
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Ответ:
1.) Yes
2.)No
3.)Yes
4.)No
Step-by-step explanation:
1.) 12.5 - 8.4 = 4.1
4.1 x 7.4 = 30.34
7.4 x 4.1 = 30.34
2.)24 - 1.6 = 22.4
22.4 / 3.2 =7
6.4 / 3.2 = 2
7 does not equal 2
3.) 7.4 + 12.5 = 19.9
19.9 - 8.4 = 11.5
7.4 + 4.1 = 11.5
11.5 = 11.5
4.)8 x 2.5 = 20
20 - 3.2 = 16.8
20 + 4.1 = 24.1
24.1 does not equal 16.8
Ответ:
≈ 0.39
Step-by-step explanation:
Area of circle:
S = πr² = π4² ≈ 50.27 cm²Area of triangle:
S = 1/2bh = 1/2*2*3 *(4+2.5) = 19.5 cm²Probability of the point within red shaded area:
P = 19.5/50.27 ≈ 0.39