The mean of ten numbers is 58. If one of the numbers is 40, what is the mean of the other nine? * • 18
• 60
• 162
• 540​

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

Which is the correct first step in finding the area of the base of a cylinder with a volume of 26x cubic meters and a height of 6.5 meters? v=bh 6.5=b(26x) v=bh v=26pi+(6.5) v=bh v=26pi(6.5) v=bh 26pi=b(6.5)

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.