Question

Please please help please

Answer 1

Answer:

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Answer 2

1. Finding 'x' in the given proportions :

a) The value of x is 2.

Given,

x : 7 = 120 : 420

=> x / 7 = 120 / 420

=> x = ( 7 × 120 ) / 420

=> x = 2

b) The value of x is 5.

Given,

8 : x = 80 : 50

=> 8 / x = 80 / 50

=> ( 8 × 50 ) / 80 = x

=> x = 5

2. Writing expressions for the given statements :

a) Seven less than a number t = t - 7

b) The product of 7 and a number n = 7 × n = 7n

c) Five more than twice a number b = 5 + 2b

d) Three times a number k is decreased by 11 = 3k - 11

3. Solving the given equation :

The value of h in the given equation is 37.

Given equation :

{ 3 + ( h - 10 ) } / 2 = 15

=> 3 +  ( h - 10 ) = 2 × 15

=> 3 + ( h - 10 ) = 30

=> h - 10 = 30 - 3

=> h - 10 = 27

=> h = 27 + 10

=> h = 37