Maggie’s brother is 11 years younger than twice her age. the sum of their ages is 31. how old is maggie?

Hey there!

Let's write this as a system of equations.

m+b=31

b= 2m-11

Let's plug our value for b into the first equation and solve for m.

m+2m-11=31

Let's combine like terms.

3m-11=31

We add 11 to both sides.

3m=42

We divide both sides by 3.

m=14

Therefore, Maggie is 14 years old.

I hope this helps!

2x plus 11 equall 31 subtract 11 from 31 divide the answer by 2 and x equals 10

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.