Alvin is 15 years older than Elga. The sum of their ages is 81. What is Elga's age

33

Step-by-step explanation:

let Elga age be x

And So Alvin age is x+15

x+x+15=81

2x+15=81

2x=81-15

2x=66

x=66/2

x=33

Let the age of Elga be x, the age of Alvin will be (x+15).

Given that, sum of their ages is 81.

x+(x+15)=81

2x+15=81

2x=66

x= 66/2

•°•x=33

•°• The age of Elga is 33 yrs.

the ratio of white tiles to blue tiles is 48: 16. the ratio in it's simplest form is 3: 1.

step-by-step explanation:

ratio: take the first number and add a colon next to it, then add the second number after that. make sure the ratio order matches up with the written problem!

simplest form: we can simplify the ratio 48 : 16 by dividing both terms by the greatest common factor (gcf).

the gcf of 48 and 16 is 16.

divide both terms by 16:

48 ÷ 16 = 3

16 ÷ 16 = 1

reducing to simplest form:

48 : 16 = 3 : 1