What does a residual value of 1.3 mean when referring to the line of best fit of a data set?
a data point is 1.3 units above the line of best fit.
a data point is 1.3 units below the line of best fit.
the line of best fit has a slope of –1.3
the line of best fit has a slope of 1.3.

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

60°

step-by-step explanation:

the measure angle of c in an isosceles triangle abc is 60° because in isosceles triangle,the measures of all the angles is 60°.