Question

Answer the following questions-
Q1) The sum of two numbers is 25. One of the numbers is twice the other.
Q2) Ravi's father's age is 5 years more than 3 times Ravi's age. If the father's age is y years, then what is Ravi's age.
Q3) A rectangular box is of height h cm. Its length is 3 times its height and the breadth is 7 cm less than the length, breadth in terms of height.
Q4) 6a+5b when a=4 and b=-2
Q5) 6x²-7x+3 when x=3
Q6) -9p+7pq-2pq-11p-9pq when p=2,q=-3

Answer 1

Answer:

Q1)

x+y=25

x=2y

2y+y=25

y=25/3

x=75/3

Q4)

(6x4)+(5x-2)=24-10=14

Q5)

(6x3²)-(7x3)+3=54-21+3=57-21=36

Q6)

answer is -28