Solve the system by substitution. check your solution.
0.5x+0.25y=36
y+18=16x
a.
(36, 72)
c.
(49, 81)
b.
(9, 126)
d.
(21, 9)

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

The length of triangle base is 26. a line, which is parallel to the base divides the triangle into two equal area parts. find the length of the segment between triangle legs.

What value of x is in the solution set of 4x – 12 s 16 + 8x?