Maggie’s brother is 3 years younger than twice her age. the sum of their ages is 24. how old is maggie?

Maggie is 9

Step-by-step explanation:

Let's denote Maggie's age with x and his brother's with y.

First we know that the sum of their ages is 24, so

x+y=24

Then we know that y=2x-3, Maggie's brother (y) is 3 years younger (-3) than twice her age (2x)

Then with these two equations we have

x+y=24

y=2x-3

we can replace y of the second equation into the first and solve for x (Maggie's age)

x+2x-3=24

3x=27

x=9

so  we get Maggie's age x=9. Replacing it into the second equation we get her brothers age also y=15.

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

happy to

pls mark as brainliest