Answer:

Step-by-step explanation:
we know that
If two figures are similar, then the ratio o its corresponding sides is proportional, and this ratio is called the scale factor
In this problem the corresponding sides are
12 units and 15 units
16 units and n units
therefore

Solve for n


Answer:
- 24x + 9
Step-by-step explanation:
Differentiate each term using the power rule
( a
) = na
Given
f(x) = - 12x² + 9x, then
f'(x) = (2 × - 12)x + (9 × 1)
= - 24x + 9
2960 mod 9 = 8. So the classrooms he can take it to are 8, 17, 26, ... 17 is among these so he is correct
Do 21/100, which is the fraction....