David is twice as old as Sara, and Jessica is three times as old as Sara. If their ages add up to 30, how old is David?

x = Sara's age

2x = David's age

3x = Jessica's age

The product of 126 times 52 is more than 125 x 52, but by how much more? show the steps that you took to answer the problem by using mathematical language

Jackson owes his sister Monica $15. Monica has a $10 in her pocket. Explain the meaning of zero in this situation.

How much gallons does 20 quarts equal?

8 teaspoons for 4 cups

How to solve 2x+2y=6

Solve: 5x - 7x + 6 = - 2 (x - 3).

Select thee values of r below that represents a low key no correlation 1) 0.8 2) 0.3 3) 0.1 4) - 0.2 5) - 0.5 6) 1 7) - 0.001

The graph of g (x) is obtained by reflecting the graph of f (x) = 4|x| over the x-axis. Which equation describes g (x) ? A) g (x) = |x-4| B) g (x) = |x+4| C) g (x) = -4|x| D) g (x) = |x|-4

Can you simplify a+2/5a^2+6*3/6

What are the solutions of |6x-1| ≤ 23? Write the solutions as either the union or the intersection of two sets.