Solve the system of equations using substitution. 3x + 2y = 7 y = –3x + 11 a. (6, –3) b. (6, –7) c. (5, –4) d. (-4, 19/2)

Classify each polynomial by its degree and by its number of terms.

S-7< 3 i need answering this problem someone asap answer

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)