Nicks is making bread dough. the recipe requires 3/4 cu of flour and 1 1/8 teaspoons of salt. nick wants to make the recipe using 1 cup of flour, to maintain the ratio, how much salt is required when 1 cup of flour is used.

3/4 cup flour      1 cup flour

=  

1 1/8 tsp salt     x tsp salt

using cross products

3/4 * x = 1 1/8 * 1

change the mixed number

(1 1/8 to an improper fraction  = 9/8)

3/4 x =9/8

multiply each side by 4/3

3/4 x * 4/3 = 9/8 * 4/3

x =36/24

x =3/2

x= 1 1/2 tsp salt

the answer is d

the answer is in the first quadrant, which make the y-int positive.

since the dots are going down, therefore the correlation is negative

i hope it is right.

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

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