Pls help me , i rlly need help 1 Write the multiplicative inverse of : {-8/7 x 21/32}

2 Calculate the final value of (4/5 to the power of -2

3 Arrange the rational numbers in the descending order: 13/10, 7/25, 9/5

4 The population of a state is 21600000. Express the number in the scientific form.

5 Express the number 3125 in the exponential form.

6 Represent – 9/6 and 5/6 on the number line.

Simplify: 52 raised to the power15 ÷ 13 raised to the power 15
8 One coin weighs 5 3/4 g. Calculate the weight of 12 coins.

heyyy

step-by-step explanation:

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

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