Christina is 4 feet tall and is standing in the shade under a tree such that the end of her shadow coincides with the end of a tree's shadow. Her
shadow is 3 feet long and the distance between her and the tree is 21 feet.
What is the height of the tree?

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x

answer: on graphs, the open and closed circles, or vertical asymptotes drawn as dashed lines us identify discontinuities.

as before, graphs and tables allow us to estimate at best.

when working with formulas, getting zero in the denominator indicates a point of discontinuity.

when working with piecewise-defined functions, check for discontinuities at the transition points where one piece ends and the next begins.

step-by-step explanation:

answer: 1475

step-by-step explanation:

becuase you have to know what they are asking you

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because parallelagram have all 4 angels the same size dependeing and a rectangle and square are oth parallelogram