Pls with in which line is a mistake first made when solving the following system of equations by substitution? 2x - y =-4 3x + y = -9line 1: 2x -y = -4y= 3x-9line 2: 2x-(3x-9)=-4 line 3: 2x-3x+9=-4line 4: -1x + 9 = -4line 5: -1x = -13line 6: x = 13

To ? nd out how many students are unhappy with the dining hall food, you distribute a survey. which method of surveying would produce the least amount of bias in your data?

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

If i have a 24 in loaf of bread and i cut it into two pieces one 9 in how long was the other