A: How much soda do you drink every day?

B: I only drink a little soda every day.

A: How much vegetables do you eat every day?

B: I don’t eat any vegetables every day.

A: How much video games do you play every night?

B: I play lots of video games every night.

A: How much hamburger do you eat every day?

B: I eat a lot of hamburgers everyday.

A: How much do you sleep every night?

B: I get some sleep every night.

Loại: How much exercise do you do every day?

Diện tích hình tròn là: 

`0,4 xx 0,4 xx 3,14 = 0,5024 (dm^2)`

1. Jimmy does lots of exercise every week.

2. Joey doesn’t watch much TV every day.

3. Janet drinks some soda every week.

4. Jonny doesn’t eat any salad every day.

A: Do you have a healthy lifestyle?

B: No, I don't.

A: Why?

B: Because I don't do excercise and eat fruit every day.

- Drinking soda is unhealthy.

- Getting some sleep is unhealthy.

- Doing excercise is healthy.

`(7x - 11)/12 = (7 - 3x)/(-4) `

`=> (-4)(7x-11) = 12(7-3x)`

`=> -28x + 44 = 84 - 36x`

`=> -28x + 36x + 44 - 84 = 0`

`=> 8x - 40 = 0`

`=> 8x = 40`

`=> x = 5`

x^2 + x + 4x + 4 = 4 - x^2

`<=> x^2 + 5x + 4 = 4 - x^2`

`<=> 2x^2 + 5x = 0 `

`<=> x(2x + 5) = 0`

`<=> x = 0` hoặc `2x + 5 = 0`

`<=> x = 0` hoặc `x = -5/2`