Question

What should be multiplied to (7)- to get (4)-2?
What should (-5)-2 be multiplied with, so as to obtain (-3) -1?
By what number should (-15)- be multipiéd to so as to obtain (5)-3?​

Answer 1

Given :-

1) What should be multiplied to 7 to get (4)-2?

Answer :-

$7x = 2 \\ x = \frac{2}{7} \\ = 0.285$

Given :-

2) What should (-5)-2 be multiplied with, so as to obtain (-3) -1?

Answer :-

$x \times (- 7) = - 4 \\ x = \frac{ - 4}{ - 7} \\ x = 0.571$

Given :-

By what number should (-15)- be multipied to so as to obtain (5)-3?

Answer :-

Let the required number be xx.Therefore,(15) ^−1×x

=(−5) ^−1

15^1×x

= 5^−1x

= −3

Answer 2

Answer:

1) 7x=2

x= 2/7

=0.285

2)x × (−7) = −4

x= -4/ −7

x=0.571

3)Let the required number be xx.Therefore,(15) ^−1 × x

=(−5) ^−1

15^1 × x

= 5^ − 1x

= −3

Hope this is helpful for you.