If m is the number of magic markers, which variable expression represents the phrase below?
the difference between the number of magic markers and 7 colored pencils.

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

If you are just building your payment history, how many points from a perfect score will you possibly miss?

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?