15. Find the values of a and b so that the solution of the linear system is (5.2). ax + by = 23
ax – by = 7
Equation 1
Equation 2
need help on number 15 please

The radius of a sphere is 3 inches. which represents the volume of the sphere?

Jon’s weight loss for each week of the month is 5 lbs., 2.5 lbs., and 2.5 lbs. he gained 3.5 lbs. the last week. if jon originally weighed 198 lbs., how much does he weigh now?

If the segment op is dilated by a scale factor r=2, what is the length of segment op? a)10cm b)16cm c)6cm d)4cm