ai k với mik đi 
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ZS
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DP
2
MH
12 tháng 3 2019
Ta có:
Đồ thị hàm số y=ax+b song song với y=-2x+3
=> a=2; b\(\ne\)3 (1)
Mà đồ thị hàm số y=ax+b đi qua điểm M(2;5)
=> thay x=2; y=5 vào y=ax+b ta có:
5=2a+b (2)
Từ (1),(2) => a=2; b=1
25 tháng 6 2021
Everyone has a person to love. And so do I. To me, that person is my mother. This year, she is nearly 40 years old. My mom is very tall. She has a round face, brown eyes and short hair. To my ways of thinking, she is the most beautiful woman in the world. My mom cooks very well and very hard-working. She plays badminton well, too. In her free time, she often teaches me maths or surfing the Internet. My mom loves me very much. She can sacrifice everything for me. When I have problems, I always confide to my mom. She encourages and consoles me when I sad or when I got bad marks.. She gives me a present and very happy when I do good work. There is an unforgetable memory that makes me love my mom much more. That night, I had an illness and I felt so sick that I counldn't even stand. My mom spent a sleepless night to take care of me carefully. She helped me took medicine and fed me gruel. After a night, I felt much more better but my mom was very tired and sleepy. I love my mother very much. I'll try my best to make her happy and always have a smile on her lips.
19 tháng 7 2017
Chu vi hình vuông là :
12 x 4 = 48 ( cm )
Đáp số : 48 cm
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