Solve and explain how you got the answer : seven days ago, the gas tank on rosa’s car was filled with 20 gallons of gasoline. today there are 6 gallons of gasoline. what is the fuel efficiency, in miles per gallon, of rosa’s car if she drove 490 miles in the past 7 days?

Afruit stand has to decide what to charge for their produce. they need $10 for 4 apples and 4 oranges. they also need $15 for 6 apples and 6 oranges. we put this information into a system of linear equations. can we find a unique price for an apple and an orange?

Divide. write in simplest form 41/6 divided by 10

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.