According to Chebyshev's Theorem, for any distribution, at least what proportion of data are within K=2.5 standard deviations of the mean? Round your answer to the nearest whole number

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 4x^2 - 19x- 5

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

Write the standard form of an equation with (see picture below)