During a period of extreme cold the average daily temperature dropped decreased by 1.5 degree Feach day. How many days did take for the temperature to decrease by 9 degree F? Which equation would you use to find the solution?
1) x+1.5=9
2) x-1.5 = -9
3) -1.5x=-9
4) 1.5x= 9

The composite figure is made up of a parallelogram and a rectangle. find the area. a. 76 sq. units b. 48 sq. units c. 124 sq. units d. 28 sq. units

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.