Tìm tất cả các giá trị thực của tham số
m
để đường thẳng
d y x m :  –
cắt đồ thị
2 1
1
x
y
x
tại hai
điểm
A B,
sao cho độ dài đoạn thẳng
AB 2 2.

number one is the correct answer

step-by-step explanation: dogs and cats are mentioned, no other animals

mk./km: lm

step-by-step explanation:

,mlmlm

; mk

lk

fabric (square meters)                   cloaks

7                                                           21

4/3                                                         4

step-by-step explanation:

we are told that harry needs 2 square meters of fabric for every 6 wizard cloaks he makes.

1. first of all we will find how many cloaks can be made from 1 square meter of fabric by dividing 6 by 2.

we can see that 3 cloaks can be made from 1 square meter of fabric. now we will multiply 3 by 7 to find number of cloaks made from 7 square meters of fabric.

therefore, harry will make 21 cloaks from 7 square meters of fabric.

2. let us find how many square meters of fabric will be needed to make 4 cloaks.

first of all we will find fabric needed for 1 cloak by dividing 2 by 6.

we can see that fabric needed for 1 cloak is   square meter. now we will multiply   by 4 to find fabric needed for 4 cloaks.