The total cost of eight pens and five mechanical pencils is $8.55. the cost of each pencil is $0.35 cents. let the cost of a pen be p dollars. write an expression for the total cost of eight pens and five mechanical pencils in terms of p. which expression below would represent this situation?

Ageologist had two rocks on a scale that weighed 4.6 kilograms together. rock a was 0.5 of the total weight. how much did rock a weigh?

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?

What is the value of x? enter your answer in the box. x =