7.
2 answers:
Answer: The answer is (B) an enlargement with scale factor 2.
Step-by-step explanation: The quadrilateral K'L'M'N' is the dilation image of the quadrilateral KLMN. We are to select the correct description of the dilation from given four options.
We can record from the given graph that in quadrilateral KLMN, the length of one side is
KN = 1.5 units,
and in quadrilateral K'L'M'N', the length of the corresponding side is
K'N' = 3 units.
Therefore, the scale factor will be
So, there will be an enlargement with a scale factor 2.
Thus, (B) is the correct option.
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Answer:
The cost would be same after 3 months.
Step-by-step explanation:
Given that:
Charges of first company;
Sign up fee = $76
Per month charges = $40
Let,
x be the number of months
y be the total cost.
y = 40x + 76 Eqn 1
Charges of second company;
Sign up fee = $136
Per month charges = $20
y = 20x + 136 Eqn 2
For same cost,
Eqn 1 = Eqn 2
40x + 76 = 20x + 136
40x-20x = 136 - 76
20x = 60
Dividing both sides by 20
Hence,
The cost would be same after 3 months.