13. Jill has $4.10 in dimes and quarters. She has 10 mote quarters than dimes. Which system of equations best represents the situation of D represents the number of dimes and Q the number of quarters? A. D + 10 = Q .10D +.25Q = 4.10 B. 10D + 25Q = 4.10 D + 10 = 0 C. D + Q = 4.10 D = Q + 10 D. 10D + 25Q = 410 D + = 10​

Find parametric equations for the line tangent to the curve of intersection of the surfaces at the given point. surfaces: xsquared2plus+2yplus+2zequals=1212 yequals=33 point: left parenthesis 1 comma 3 comma five halves right parenthesis

What is not true about kl and mn? what is mn? (show your work)

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?