Answer:
16.8
Step-by-step explanation:
Because 2 to 8.4 is a scale factor of 1:4.2, you must solve 4*4.2. 4*4.2=16.8, so side OM is 16.8.

subtract 1 from both sides

divide by 2 on both sided
If w = width, then length = w+10, then the area is given by
lw = A or
(w+10)(w) = A or
(w+10)(w) = 375 or
w² + 10w = 375
Answer:

Step-by-step explanation:
A librarian choose seven holiday books from a selection of ten to be displayed in the window of the library. in how many different ways can she chose seven books?
This is a combination of 10 objects chosen 7 at a time:
