If Simon created a right triangle with the following diagonal, what would be the perimeter?

Which problem could be  solved  by evaluating the expression  7×(−3)7×-3?

With #! i’ve tried to figure it out but i can’t.

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21