Answer:
7.5 units
Step-by-step explanation:
Figure A maps figure B with a scale factor of 0.75. This means that the side of the smaller figure can be obtained from the corresponding side of the larger figure by multiplying by 0.75.
Sides with measures 10 and x are cprresponding sides of the figures A and B.
So,
[tex]x=0.75\cdot 10\\ \\x=7.5[/tex]
