31 - as the difference (starting from 1) increases by 1
so:
3,+1=4,+2=6,+3=9,+4=13,+5=18,+6=24,+7=31,
3/4 - per skirt >> 0.75
5 5/14 - unused >> 5.36 (approximately)
5.36/0.75= 7.14666...
Regina can make 7 skirts
Number 1 is B, number 2 is C and number 3 is A
That would be 7 because 7x2=14 and 14-9=5
Triangle ABC is similar to triangle DEC, ∠B ≅ ∠E and 3DE = 2BC
<h3>What is
transformation?</h3>
Transformation is the movement of a point from its initial location to a new location. Types of transformation are <em>rotation, reflection, translation and dilation.</em>
Dilation is the increase or decrease in the size of a figure by a scale factor.
Right triangle ABC is reflected over AC, then dilated by a scale factor of 2/3 to form triangle DEC, hence:
Triangle ABC is similar to triangle DEC, corresponding angles are congruent (∠B ≅ ∠E) and DE = (2/3)BC i.e. 3DE = 2BC
Find out more on transformation at: brainly.com/question/4289712
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