Which represents the reflection of f(x) = StartRoot x EndRoot over the x-axis?

Me find the missing dimension of a triangle height: 7 in., area: 21^2

Plz which expression is equivalent to the expression below?

In two or more complete sentences, formulate how to use technology to calculate the appropriate regression model for the given data. you are not required to find the model, just choose the appropriate regression and explain how to use the technology. (-5,,2.,0.8), (0,-0.5), (2,-1.3), (3,-0.8), (5,2)