Mary's age is twice the sum of john's age and 3. the sum of both ages is 21 years. find the age of each one.

Which statement most accurately describe why the division property of exponents does not apply to the expression (-8)^2/(-3)^4

Measures of the angle of r, 31 s (x+4) t (3x+9)

Acompany charges $0.10 for each letter engraved. bobby plans to spend no more than $5.00 on the engraving on a jewelry box. write and solve an inequality to find the maximum number of letters he can have engraved.