Answered

(Please need help lol :) )


1.The ratio of jack's weight to simon's weight is 2:3.their total weight is 70 kg.Find simon's weight

Solution:________proportion


Therefore,simon's weight is _____kg.


2.Five books of the same title weigh 3 kg

How much would 20 such books weigh?

Solution:________proportion


Therefore,20 books weighs_____kg.


3.laren earns P.12000 a month.the ratio

Of the amount she spends to the amount she

Saves in a month is 5:1.find the amount she saves in a month.


Solution:___________proportion


Therefore, the amount laren saves in a month is P________


4.A bag of rice can feed 8 people for 12 days.how long

Will the bag of rice last if there are 12 people?


Solution:__________proportion.


Therefore,a bag of rice lasts for________days if there are 12 people.


(Thankyou so much for who answer my question thankyou Ily) :)

Sagot :

Joanbalaneid

Answer:

1. 42

2. 12 kg

3. 2,000

4. 18 days

Step-by-step explanation:

1. Let x be simon's age

Let y be jack's age

x/y = 3/2

x + y =70

y = 2/3x

x + 2/3x = 70

(x + 2/3x = 70) 3

3x +2x = 210

5x = 210

x = 210/5 = 42 is simon's age

2. 5 books weighs 3kg

For 20 books, let x be its weight

5:3 = 20:x or 5/3 = 20/x

x = 20 (3/5)

x = 60/5 = 12 kg is the weight of 20 books

3. Let x be the amount she saves

Let y be the amount she spends

x/y = 1/5

x + y = 12,000

y = 5x

x + 5x = 12,000

6x = 12,000

x = 12,000/6 = 2,000 is the amount she saves per month

4. A bag of rice can feed 8 people in 12 days. For 12 people let x be the number of days.

8:12 = 12:x or 8/12 = 12/x

8x = 144

x = 144/8 = 18 days