Derek tried to dilate the isosceles trapezoid abcd with the center of dilation at the origin with a scale factor of 2. Check his work and complete the statements the slope of ac is __ the slope of eg is __ the polygons are not dilutions of each other because ___

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

Evaluate the expression for the given value of the variable. ∣-4b-8∣+∣-1-b^2 ∣+2b^3 ; b=-2