A convex polyhedron has 18 edges and 4 more vertices than faces. How many faces does the polyhedron have? Euler's formula: V + F = E + 2
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Find the value of x in each case. give reasons to justify your solutions! d q ∈ pr

12 3 4 5 6 7 8 9 10time remaining01: 24: 54which graph represents this system? y=1/2x + 3 y= 3/2x -1

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%)