The temperature of a city changed by −20 degrees celsius over a 4-week period. the temperature changed by the same amount each week.

part a: write an expression to show the average change in the temperature of the city each week.

part b: simplify the expression and explain, using words, what your answer means.

Ac contractor is building a new subdivision outside of the city. he has started work on the first street and is planning on the other streets to run in a direction parallel to the first. the second street will pass through (-2,4) find the equation of the location of the second street in standard form. a.2x+y=2 b. x-y=2 c.2x+y=2 d. x+y=2

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab