David's age is four times alisa’s age. in eight years, david will be twice as old as alisa. how old is each now?

Alissa's current age = 4

David's current age = 16

Step-by-step explanation:

if say Alissa is x years old then David is 4x years old

in 8 years Alissa will be x+8, and David 4x+8 and that's twice as Alissa's age therefore:

2×(x+8)=4x+8

2x+16 = 4x+8

16-8=4x-2x

8=2x

x=4

step-by-step explanation:

consider an orange peel: if you want to try and lay it flat, you have to stretch it, we know exactly how things are being stretched or squashed at any given point. we have many different map projections because each has different patterns of some projections can even preserve certain features of the earth without