Đột biến tạo thể tam bội không được ứng dụng để tạo ra giống cây trồng nào sau đây?

A. Dâu tằm

B. Củ cải đường

C. Đậu tương

D. Nho

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. 

Prizes are awarded ______ the number of points scored. 

A. according to

B. because of

C. adding up

D. resulting in

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. 

Educated in the UK (A), his qualifications are (B) widely recognized (C) in the world of professionals. (D) 

A. the UK

B. his qualifications are

C. recognized

D. world of professionals

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions

As we walked past, we saw John _____ his car.

A. to repair

B. repaired

C. in repairing

D. repairing

x^2+4x^2+9x^2+16x^2+25x^2=220

55x^2=220

x^2=220:55

x^2=4

x=2

Vậy x có giá trị bằng 2

1,5:2 và 3,6:4,8

=>Ta lập được bốn tỉ lệ thức sau:

\(\frac{1,5}{2}=\frac{3,6}{4,8};\frac{2}{1,5}=\frac{4,8}{3,6};\frac{3,6}{1,5}=\frac{4,8}{2};\frac{1,5}{3,6}=\frac{2}{4,8}\)

mik

a, 1/1/2 .x +1/1/3= 1/1/4

3/2.x+4/3=5/4

3/2.x=5/4-4/3

3/2.x=-1/2

x=-1/2:3/2

x=-1/18

Vậy x=-1/18

4-(27-3)=x-(13-4)

4-24=x-9

-20=x-9

x = -20 +9

x=-11

Vậy x bằng -11

Cho góc 60o. Vẽ tia phân giác của góc ấy.