In 1999 there were 4076 J. C. Penney stores and in 2010 there were 1106 stores. Write a linear equation that gives the number of stores in terms of the year. Let t = 9 represent 1999. Then predict the numbers of stores for the years 2016 and 2018. Are your answers reasonable? Explain.

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Aplot of land has been surveyed for a new housing development with borders ab, bc, dc, and da. the plot of land is a right trapezoid with a height of 60 feet and an opposite leg length of 65 feet

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.