Prove algebraically that 0.8 = 8/9

Simplify (x-y + 1) - (x + y - 1). -2x + 2y -2y + 2 2y - 2 2x - 2y + 2

A ball on a pendulum moves 30 cm on its first swing. Each succeeding swing it moves 0.5 the distance of the previous swing. What is the total distance that the ball moves before coming to rest? Write your answer in the box.

Okay so this is for my math homework that I wasn't able to do earlier.

Equivalent ratios to 16/12

A triangle has side lengths of 5, 9, and 12. Determine whether the triangle is right, acute, or obtuse. A triangle has side lengths of 5, 9, and 12. Determine whether the triangle is A. right B. acute C. obtuse

Given the linear equation x - y = 5, find the slope of its graph. A.-5 B.-1 C. 1 D. 5

Use the definition of continuity to determine whether f is continuous at a. f (x) = x-4x+5; a = 4 Not continuous Continuous

Balance the equation. Mg + HCl → H2 + MgCl2 A. Mg + 2HCl → H2 + MgCl2 B. Mg + HCl → H + MgCl C. Mg + HCl → H2 + MgCl

43. Which describes the lines y = - x + 12 and y = - x + 7? A. parallel B. perpendicular C. neither D. both

Pamela is 11 years younger than jiri the sum of their ages is age is 35 what is Jiris age