Aset of data points has a line of best fit of y=2.5x-1.5 what is the residual for point (4,7)

In the given figure ar(adf) =ar(cda) and ar(cdf) = ar(cdf). show that abdc and cdfe are trapeziums.

What is the circumference of a circle with an area of 50.24 cm²?

Javier bought a painting for $150. each year, the painting's value increases by a factor of 1.15. which expression gives the painting's value after 77 years?