3). Make questions to which the underlined words are the answers 1. There are only a few books on the shelf.
2. He lives in Athens.
3. She was born on
July the 3rd.
4. Mrs Jones is going
tonight.

5. The Browns watch TV in the evening.
5. No, I never
play football on weekdays.
CDs.
7. He spends a lot of
at 11.30p. m.
3. Helen was
sleeping
3. John moved to a new flat last week
me
O. Mrs Smith
a piece of cake
gave
1. She left home because she quarrelled with her sister
2.
It was
raining yesterday afternoon.
every day
3. Judith tidies her room​

if im not mistaking its

step-by-step explanation:  

hello!

to begin with, we're given that on earth, a rock weighs 20 pounds, and while on jupiter, that same rock weighs 42 pounds. now, we're trying to find the weight of a rock that weighs 10.5 pounds on earth, on jupiter.

to solve this, first, set up a proportion, cross-multiply, and solve it algebraically.

setting up the proportion is the hardest and the most confusing part of the problem, but it's simple.

if on earth, the rock weighs 20 lbs, and on jupiter it weighs 42 lbs, our first part of our proportion is 20/42 lbs. the second part has to be equal to each other. this means that 10.5 has to be on the numerator of the fraction, and x, the value we're trying to find, has to be on the denominator. remember that the rock weighs 10.5 lbs on earth, and we're trying to find the weight of it on jupiter (which is x).

20/42 = 10.5/x

next, you would cross-multiply.

20x = 42(10.5)

20x = 441

now, solve it algebraically by using division.

x = 22.05 lbs

this can be rounded to 22.1 lbs.

therefore, the weight of the rock on jupiter is 22.1 lbs, the fourth choice.