Question

Pls with explanation​

Answer 1

Answer:

x= -1

Step-by-step explanation:

Since the bases are all the same, just copy the exponents

4+(-7) = 2x-1

-3 = 2x - 1

-3 + 1 = 2x

$\frac{ - 2}{2} = \frac{2x}{2} \\ x = - 1$

Answer 2

Answer:

28) 6000 = 5 × 5 × 5 × 2 × 2 × 2 × 2 × 3

6000 = 5³×2⁴×3¹

Here One 5 and one 3 are not in Pairs.

So 6000 must be divided by (5×3)=15 to obtain a Perfect Square.

I.e. 15 is the smallest no: by which 6000 should be divided as to obtain a Perfect square

6000/15=400

$\sqrt{400}$

$\sqrt{20 \times 20}$

ans: 20

I don't know ques-29

hope ques-28 helps you..........