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22.04.2021 •
Mathematics
Pages Read by Each Student
Class A
Class B
7
49
43
50
32
37
14
17
33
19
6
10
55
35
39
14
How much greater is the mean number of pages read by Class A than the mean number of pages read by Class B?
N
3
Solved
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Ответ:
part a:
9x2 + 24x + 16 =
(3x + 4)^2
each side measures (3x + 4) units.
part b:
16x^2 - 25y^2 =
= (4x + 5y)(4x - 5y)
the dimensions of the rectangle are (4x + 5y) units and (4x - 5y) units.