Acondominium building has 25 condo units. each unit has 5 windows. ryder said that there are 125 windows altogether.

which estimate can be used to see if ryder’s answer is reasonable? is ryder correct?

a.
30 × 5
the answer is not reasonable. ryder is not correct.

b.
30 × 5
the answer is reasonable. ryder is correct.

c.
30 ÷ 5.
the answer is not reasonable. ryder is not correct.

d.
30 + 5.
the answer is reasonable. ryder is correct.

The answer is B, 30 x 5 The answer is reasonable. Ryder is correct. It reasonable because if 25 x 5 is 125, then 30 x 5 won't be too much to be unreasonable. 30 x 5 is 150, therefore it is only 25 windows higher, so it is reasonable. Hope this helps! :)

First locate the turning point (vertex) of the graph. which is at the coordinates x=5 and y=9 or (5; 9).to determine whether it's a maximum or mininum value, you have to discern whether the vertex's y-value is the highest value or lowest value the graph can reach. since the vertex's y-value, 9 is the highest value the graph can reach, it will be a maximum.another basic way to determine whether the vertex's value is max or min is to see if the graph is smiling or sad. if it's smiling, the turning point/vertex would be a minimum, while a sad parabola would have a maximum y-value at the vertex.