The sum of half a number and four is negative 7. Choose the equation that represents the verbal sentence.
a. 2x+4=-7
B. x/2-4=-7
C. x/2+4=-7
D. x+2/2=-7

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .