I don't like heavy metal music 

1. The dentist told me to brush my teeth three times a day.
2. I am trying to keep my health by doing exercise every day.

\(\left(4^{17}+7^{52}\right)\times\left(9^8+8^9\right)\times\left(16^{10}-4^{20}\right)\)
\(=\left(4^{17}+7^{52}\right)\times\left(9^8+8^9\right)\times\left[\left(4^2\right)^{10}-4^{20}\right]\)
\(=\left(4^{17}+7^{52}\right)\times\left(9^8+8^9\right)\times\left(4^{20}-4^{20}\right)\)
\(=\left(4^{17}+7^{52}\right)\times\left(9^8+8^9\right)\times0\)
\(=0\)

À hình 

Ta có: mOn + nOz = 180^o (2 góc kề bù)
    => 60^o + nOz = 180^o
    => nOz = 180^o - 60^o
    => nOz = 120^o
Vì Ot là tia phân giác của zOn 
   => tOn = tOz = 1/2 zOn => 1/2 120^o = 60^o
Lại có: tOn = mOn (=60^o)
   On nằm giữa tOm   
=> On là tia phân giác của tOm
*_{Bạn tự thêm kí hiệu góc nhé :)}

Exercise 3: Complete the second sentence so that it has the same meaning as the first one.
1. Linh finds playing board games boring.
→ Linh doesn’t like playing board games.
2. My uncle wants to keep fit, so he plays tennis three times a week.
→ My uncle plays tennis three times a week to keep fit.
3. My sister enjoys arranging flowers.
→ My sister is interested in arranging flowers.
4. My brother likes outdoor activities. I like outdoor activities. (and)
→ My brother and I like outdoor activities.
5. Doing exercise every day is a good idea.
→ You should do exercise every day.
6. It took me three hours to make this pottery jug.
→ I spent three hours making this pottery jug.
7. Why don’t we go swimming this afternoon?
→ What about going swimming this afternoon.
8. Sitting close to the TV screen is not good for you. (shouldn’t)
→ You shouldn't sit close to the TV screen because it's not good for you.
9.I walked in the sun so long yesterday, so I got sunburn.
→ I got sunburn because I walked in the sun for so long yesterday.
10.Mark gained 3 kilos when he quit smoking.
→ Mark put on 3 kilos when he quit smoking.

multicultural

1. We took part in a clean-up campaign last week.
2. This volunteer activity helps keep the environment safe, clean, and healthy.
3. We find community activities helpful because they can help many people.
4. You should cycle or go jogging for at least 30 minutes a day to keep fit.
5. Vitamins are essential for our health.
6. My sister doesn't like mountain climbing because she is scared of heights.
7. Collecting stamps help you be more patient.

1) My father's hobby í collecting stamps
2) She often spends hours drawing pictures every Sunday
3) The Japanese live long because of their healthy diet.
4) We give these clothes to homeless children.
5) My mother started working since 1996

1) study => studies
2) sport => sporty