Question

pls work out this sums for me I'll mark u the brainist pls​

Answer 1

Step-by-step explanation:

a) 6 ^ ( 3x+11) = 216 ^ (2-x)

= 6^ (3x+11) = 6 ^ 3(2-x)

= 3x+11= 6-3x

= 6x= -5

x = -5/6

b) Pentagon adds upto 540°

5th angle= 540-(120+120+120+120)

= 60

c)first increased by 10% and then decreased by 10%

let her salary be 100

10% = 10/100 = 1/10

so 10% of 100 = 10

new salary after increase= 100 + 10 = 110..

now 10% of 110 is 11

so new salary after decrease is 110 -11 = 99

1 loss on 100 means 1%

d)(2x-3y+z)²

we know that (a+b+c)²= a²+b²+c²+2ab+2bc+2ca

= 4x² + 9y² + z² - 12xy - 6yz + 4xz

e)5 men working 8hrs. took =20 days

1 man working 1 hr. will take= 20*5*8 days

Then, 8 men working 7 hrs. will take= ( 20*5*8 )/8∗7= 100/7 days