Question

6. Find the value of the expression 2x – 3y + 4z, if x = 10, y = 12 and z = 11.
Section- D (each question carries 4 marks)
7. Determine if the following ratios form a proportion. Also, write the middle terms and extreme terms where the
ratios form a proportion.
(a) 2 kg: 50 kg and 25 g: 625 g
(b) 200 mL: 2 litre and Rs 4: Rs 50
8. Cost of a dozen bananas is Rs 180 and cost of 8 lemons is Rs 56. Find the ratio of the cost of a banana to the cost
of a lemon

Answer 1

Answer:

6.Ans):-

Step 1:- 2x-3y+4z

Step 2:- Given that,

x = 10, y= 12 & z= 11

Step 3:- Now put the value of X,y & z, we get

2×10 - 3×12 + 4×11

Step 4:- 20-36+44

Step 5:- 28

Answer 2

Answer:

2 kg: 50 kg and 25 g: 625 g

(b) 200 mL: 2 litre and Rs 4: Rs 50

8. Cost of a dozen bananas is Rs 180 and cost of 8 lemons is Rs 56. Find the ratio of the cost of a banana to the cost

Step-by-step explanation:

hope it helps you