Jenan25
06.11.2020 •
Mathematics
M<2=4x+12
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Ответ:
Ответ:
m∠2 =60
60=4x+12
subtract 12 from both sides
60-12=4x+12-12
60-12=4x
48=4x
divide both sides by 4
48÷4=4x÷4
48÷4=x
x=12
Plug it into the equation
4(12)+12=
48+12=
m∠2 =60
another proof is that they are congruent
I hope this is good enough:
Ответ:
To find the volume of a rectangular prism, we can use the formula [ V = l * w * h ]
V = 5 * 2 1/2 * 1 1/2
V = 12 1/2 * 1 1/2
V = 18 3/4cm³
Now that we know the volume, we can check each answer choice.
Option A:
5 ∙ 2 1/2 ∙ 1 1/2
12 1/2 * 1 1/2
18 3/4cm³
Option B:
12 1/2 ∙ 1 1/2
18 3/4cm³
Option C:
1 1/2(5 + 2 1/2)
1 1/2(7 1/2)
11 1/4cm³
Option D:
1/2(12 1/2 ∙ 1 1/2)
1/2(18 3/4)
9 3/8cm³
Therefore, the only correct options are A and B.
Best of Luck!