i think of a number, add 3 to it and multiply it by 7 how can i use algebaric expressions to simplfy this

Gail is making costumes for a school play. each rabbit costume needs one and one half yards of white fur fabric, a yard of blue striped fabric, and a quarter of a yard of pink felt for the ears. g? ail needs to make eight rabbit man yards will she need, for the white fur fabric, blue striped fabric, and pink felt?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

What is the absolute value of the complex number -4- 2 v14 3.15 14 18