Sonia and sophia are sisters. sonia is 15 years older than sophia. the sum of their ages is 63. how old is sophia?

What should be done to solve the equation? x+14=21 add 14 to both sides of the equation. subtract 14 from the left side of the equation. add 14 to the left side and subtract 14 from the right side of the equation. subtract 14 from both sides of the equation.

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11