Question

What number when increased by 30% becomes 650?​

Answer 1

Answer:

500

Step-by-step explanation:

let the no. be x

x+30/100x= 650

x(130/100)=650

therefore x=500

Answer 2

Answer:

Question 7)

a) Factorise the following questions: [4]

i) x

2

– y

2

ii) 4x2

– 9y2

b) Find the value of [3]

(207)2

- (193)2

c) Find two rational number between 1 and 2. [3]

Question 8)

a) What percent is : [4]

i) 60 of 360? ii) 4.1 of 410

b) Calcul;ate the profit or loss percentages if C.P. = Rs 560 and SP = Rs 500. [3]

c) The area of a square is 9 a2

+ 24 ab + 16 b2

. Find the side of the square. [3]

Question 9)

a) Find the common factors: [4]

i) 5x, 7xy ii) x2

y

2

, y2

z

2

b) Factorise: x

3

+ 7x2

– x - 7 [3]

c) Simplify:

x

[3]

Question 10)

a) Evaluate: [4]

√

x √

b) Make the following perfect trinominal square: [3]

i) (2x)2

+ ____________ - 8x

ii) ____________ + 60x + 9x2

iii) 9x2

+ y2

- ______________

c) Find the cp if sp = Rs 150 and profit = 50% [3]

Question 11)

a) A chartered accountant charged a fee of Rs 8000 to his client. He must- include 7%

GST while raising the bill. Find the billing amount. [4]

b) Factorise: x2

+ 7x + 12 [3]

c) 25% of a sand heap weighs 250 kg. What will half of the heap weigh? [3]