Step-by-step explanation:
an object and its shadow create a right-angled triangle.
2 objects and their shadows create 2 similar right-angled triangles.
that means the angles are the same, and the side lengths of one triangle all correlate with the corresponding side lengths of the other triangle via the same factor.
so,
42 × f = 6
f = 6/42 = 1/7
the length of Joel's shadow is then
20 × f = 20 × 1/7 = 2.857142857... ft
3 + 2 = 1 + 4
2 + 15 = 10 + 7
8 + 9 = 19 - 2
12 - 7 = 14 - 9
Hope this helped!
Answer: I uploaded the answer to a file hosting. Here's link:
Step-by-step explanation:
9 rolls* (3 cups of flour/ 27 dinner rolls)= 1 cup of flour.
1 cup of flour is needed to make 9 rolls~
The answer would be (x+1) and (x+10) so E