I would would say 7.
Mom + Dad + daughter + daughter + daughter + daughter + plus one brother = 7
Since they are all sisters and it says each one has one brother I think that would mean 7. That's just my comprehension of the question, though I may 100% wrong.
Answer:

Step-by-step explanation:

Hope this helped!
<h2>
~AnonymousHelper1807</h2>
This is a triangular prism.
The lateral faces are triangles; this means that the two bases are parallel to one another. This makes it a prism instead of a pyramid.
The bases being triangles makes it a triangular prism.
Step-by-step explanation:
4 tubes connected vertically.
each tube is 0.28 meters long.
it does not leave me any other form of interpretation than just to stack the tubes on top of each other.
4×0.28 = 1.12 meters
A quadratic should be in the form ax²+bx+c=0
where a b and c are all numbers