In (x-3)= in (7x-23) - In(x+1)

Answer

Formula for lagarythm:logab=c   −−−−>ac=b

Base of ln is e=2,7ln(x−3)=ln(7x−23)−ln(x+1)ln(x−3)=ln(x+17x−23)   ∣subtract ln(x+17x−23)ln(x−3x+17x−23)=0ln((x+1)(x−3)7x−23)=02,70=(x+1)(x−3)7x−231=(x+1)(x−3)7x−23   ∣multiply by (x+1)(x−3)(x+1)(x−3)=7x−23x2−3x+x−3=7x−23x2−9x−26=0x=21(9−185)  or  x=21(9+185)

well there are two answers for that.

1: you need 120 ones then that will equal up to 120.

2: you could also do one 100 and 2 tens.

those are the answers that i have thought of.

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional