What is the value of x in the figure

Let w=23 . what is the value of w + 45 ?

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

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?