Ineed with three math (algebra) problems?
1. which expression has a value of 66
a) (7^2 - 8) × 2 - 16
b) 7^2 - 8 × (2 - 16)
c) 7^( - 8 × 2) - 16
d) 7^2 - 8 × 2 - 16
2. what is the value of the expression
2( a + b)2 - b) when a = 7 and b =1 ?
a) 14
b) 49
c) 126
d)127
4) what is the value of the expression
8 - (2^2 + 48) ÷ 8
a) -6
b) -1
c) 1
d) 6

30 is 6 multiplied by a number y as a equation

Aconvex octagon has interior angles that measures 73 degrees, 172 degrees, 132 degrees, 59 degrees, 154 degrees, 163 degrees, x degrees, 2x degrees find the value of the missing angles

Three friends went on a road trip from phoenix, az, to san diego, ca. mark drove 50 percent of the distance. jason drove 1/8 of the distance. andy drove the remainder of the distance. 1. andy thinks he drove 1/4 of the distance from phoenix, az, to san diego, ca. is andy correct? 2. the distance from phoenix, az, to san diego, ca, is 360 miles. how many miles did each person drive? 3. solve the problem. what is the answer in total?