What are the coordinates of the orthocenter of △DEF with vertices at D(−1, 2), E(−1, −4), and F(2, −4)?

m∠a is 90°

m∠b is 40°

step-by-step explanation:

a child is 12 years old, and his father is 32 years older. in how many years will the age of the father be 2 times the age of the child?

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this needs to be the answer format, or else your answer is incomplete.

if the number of years is x, then the equation is

in __ years