Which equation can be used to find the answer?

dania marks off 18.7 m of a playing field for a sports festival. she needs to mark off a total of 29 m to finish the field. how many more meters does dania have left to mark off?

a.
f = 29 ÷ 2
f = 14.5
14.5 m

b.
f – 18.7 = 29
f = 47.7
47.7 m

c.
f = 18.7 · 2
f = 37.4
37.4 m

d.
f + 18.7 = 29
f = 10.3
10.3 m

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

One side of a rectangle is 7 centimeters shorter than six times the other side. find the length of the longer side if we also know that the perimeter of the rectangle is 266 centimeters.

Suppose we have a set of small wooden blocks showing the 26 letters of the english alphabet, one letter per block. (think of scrabble tiles.) our set includes 10 copies of each letter. we place them into a bag and draw out one block at a time. (a) if we line up the letters on a rack as we draw them, how different ways coukl we fill a rack of 5 letters? (b) now suppose we just toss our chosen blocks into a pile, and whenever we draw a letter we already have, we put it back in the bag and draw again. how many different piles of 5 blocks could result? possible? piles will contain at least one repeated letter? (c) if we draw out 5 blocks wit hout looking at them, how many different piles are (d) if we draw out 5 blocks without looking at them, how many of the possible 2. (4) consider the following formula. 12 give two different proofs, one using the factorial formulas and the other combina torial.