Đề kiểm tra Chương III môn Đại số 9 - Trường THCS Phổ An

Trường: THCS Phổ An 	 ĐỀ KIỂM TRA CHƯƠNG III
Họ và tên:.........................	 Môn: Đại Số 9
Lớp:.................................. 	 THỜI GIAN: 45’
ĐIỂM:
Lời phê của GVBM:...................................................................................................
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ĐỀ BÀI:
Bài 1: ( 2 điểm) Cho hệ phương trình
Tìm k để hệ có nghiệm (x;y) = (2; 1).
Tìm k để hệ có một nghiệm duy nhất.
Bài 2: ( 4 điểm) Giải hệ phương trình sau: 
a. 	b. 	c. 
Bài 3: ( 3 điểm) Một ô tô dự định đi từ A đến B với thời gian nhất định. Nếu tăng vận tốc 10 km/h sẽ đến nơi sớm hơn 3h. Nếu giảm vận tốc 10 km/h sẽ đến trễ 5h. Tính quãng đường AB.
Bài 4: ( 1 điểm) Tìm a và b biết đố thị hàm số y = ax + b đi qua các điểm ( và ( 2 ; )
Bài làm:
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