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kiểm tra đại số chương 3

Trờng THCS Hồng Thuỷ
9

Kiểm tra bài số 3 i s

Họ và tên:..........................
45 phút.
Lớp: 9.....
tra:.../....../2014
Điểm:

Thời gian:
Ngày kiểm

Lời nhận xét của giáo viên:

Đề 1

Câu 1: Giải các hệ phơng trình sau:
5 x 2 y 4
6 x 3 y 7


a,

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2 x y 3 x y 4
x y 2 x y 5

b,

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Câu 2: Tính độ dài hai cạnh góc vuông của một tam giác vuông,
biết rằng nếu tăng mỗi cạnh lên 3cm thì diện tích tam giác đó sẽ
tăng thêm 36cm2 và nếu một cạnh giảm đi 2cm, cạnh kia giảm đi
4cm thì diện tích tam giác đó giảm đi 26cm2.
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Trờng THCS Hồng Thuỷ
9

Kiểm tra bài số 3 i s

Họ và tên:..........................
45 phút.
Lớp: 9.....
tra:.../....../2014
Điểm:

Thời gian:
Ngày kiểm

Lời nhận xét của giáo viên:

Đề 2

Câu 1: Giải các hệ phơng trình sau:


 2 x  3 y  2
 3 x  2 y  3

a, 

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 2 x  2   31  y   2
 3 x  2  21  y   3

b b, 

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Câu 2: Tính độ dài hai cạnh góc vuông của một tam giác vuông,
biết rằng nếu tăng mỗi cạnh lên 2cm thì diện tích tam giác đó sẽ
tăng thêm 33,5cm2 và nếu một cạnh giảm đi 1cm, cạnh kia giảm đi
2cm thì diện tích tam giác đó giảm đi 25cm2.
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