Jacob receives $15 per week for his allowance. His parents have asked him to put $5 in his savings account and the rest of his allowance is spending money. What is the ratio of the amount of money he saves to the amount of money he can spend?

Does the point (1, sqrt 7) lie on circle shown.

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

What expression is equivalent to log3(x+4)