Quiz consists of 60 true or false questions. If the student guesses on each question, what is the standard deviation of the num
1 answer:
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Since triangle ADE is similar to triangle ABC and the scale factor is 2, the following relation must be fulfilled:
The, by substituting the given information, we have
By multiplying both sides by x+2, we get
which gives
Then, by subtracting 4x to both sides, we have
and by adding 8 to both sides, we obtain
then, x is given by
Then, by substitutn
Answer:
B and D
Step-by-step explanation:
to calculate the slope m use the gradient formula
m = ( y₂ - y₁ ) / ( x₂ - x₁ )
(4)
with (x₁, y₁ ) = (0, - 4) and (x₂, y₂ ) = (3, - 1) ← 2 points from table
m = =
= 1 → B
(5)
with (x₁, y₁ ) = (- 1, - 4) and (x₂, y₂ ) = (2, 5) ← 2 points from table
m = =
= 3 → D