What is the answer to 6x+7=8x-13

The triangles are similar. what is the value of x? show your work.

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

The data in the table represent the height of an object over time. which model best represents the data? height of an object time (seconds) height (feet) 05 1 50 2 70 3 48 quadratic, because the height of the object increases or decreases with a multiplicative rate of change quadratic, because the height increases and then decreases exponential, because the height of the object increases or decreases with a multiplicative rate of change exponential, because the height increases and then decreases