Question

pls answer as fast as possible answwr all thrww please​

Answer 1

Answer:

1) 140, 2)9:1. 3)75

Step-by-step explanation:

1) x-1/x=5

(a-b) ^3 = a^3-b^3 -3ab(a-b)

5^3 = x^3-1/x^3 -3*x* 1/x(5)

125 =x^3-1/x^3 -15

x^3-1/x^3= 125+15= 140

2)

if plastic ball diameter is x

then rubber ball diameter will be x/3

radius of plastic =x/2

radius of rubber =x/6

so surface area of sphere =4πr^2

here the variable is only radius so

the ratio

=

(x/2)^2:(x/6)^2

1:1/9

so ratio = 9:1

3)

draw another line parallel to AB and CD

from the point which is making x angle

so 140 and it's linear pair angles= 40

by adding alternative angle of 40 and 35 gives us the value of x

so x=35+40=75