Question

please please tell me how to solve these problems with steps
i will give thanks and brainlest to you
please
please
i am in big problem
If not all please give me some question steps

Answer 1

Answer:

this is the answer of first question.plz mark me brainliest

Step-by-step explanation:

2^( x - 7 ) × 5^( x - 4 ) = 1250

1250 = 2 × 5 × 5 × 5 × 5

2^( x - 7 ) × 5^( x - 4 ) = 2^1 × 5^4

So, x - 7 = 1

x = 7 + 1 or x = 8

Or

x - 4 = 4

x = 4 + 4 or x = 8

Hence, value of x = 8

Hope it helps☺!✌

48.√3-1\√3+1=a-b√3

(Rationalize the denominator)

In LHS(left hand side)

= (√3-1)(√3-1)\(√3+1)(√3-1)

= 3+1-2√3\3-1

=4-2√3\2

(Taking 2 common from numerator)

=2-√3 (1)

In RHS

a-b√3. (2)

A.T.Q(according to question)

(1)=(2)

2-√3=a-b√3 (Comparing both equations)

So, a=2,b=1.