Tìm hai số biết tổng của chúng là 318 và hiệu là 42

A. 180 và 138

B. 181 và 137

C. 182 và 140

D. 183 và 135

Trung bình cộng của các số 115; 246 và 374 là:

A. 241

B. 243

C. 245

D. 247

Khối lập phương là khối đa diện đều loại

A. {5;3}

B. {3;4}

C. {4;3}

D. {3;5}

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

You may have heard that tomatoes and processed tomato product like tomato sauce and canned tomatoes protect (31)______ some types of cancer. The cancer-preventing properties of tomato products have been (32)______ to lycopene. It is a bright red pigment found in tomatoes and other red fruits and is the cause of their red color. Unlike other fruits and vegetables, where nutritional content such as vitamin C is diminished upon cooking, processing of tomatoes increases the concentration of lycopene. Lycopene in tomato paste is four times (33)______ in fresh tomatoes. This is because lycopene is insoluble in water and is tightly bound to vegetable fiber. Thus, (34)______ tomato products such as pasteurized tomato juice, so up, sauce, and ketchup contain the highest concentrations of lycopene. Cooking and crushing tomatoes as in the canning process and serving in oil-rich dishes such as spaghetti sauce or pizza (35)______ increase assimilation from the digestive tract into the bloodstream. Lycopene is a fat-soluble substance, so the oil is said to help absorption to a great extent.

Question 34

A. fresh

B. processed

C. contained

D. raw

I’m sorry, teacher. I’ve _______ my homework on the bus.

A. forgotten

B. let

C. missed

D. left

A=x|x−2|x2+8x−20=x|x−2|x2+10x−2x+20=x|x−2|(x−2)(x+10)A=x|x−2|x2+8x−20=x|x−2|x2+10x−2x+20=x|x−2|(x−2)(x+10)

- Nếu x = 0 hoặc x = 2 thì A = 0

- Nếu x > 2 thì A = xx+10xx+10

- Nếu x < 2 (với x ≠≠ 0) thì A = −xx+10