Step-by-step explanation:
1. AB = BC (B is the midpoint of AC)
2. DE = EF (E is the midpoint of DF)
3. EB is common
4. ∠ABE = ∠CBE; ∠BED = ∠BEF (EB⊥AC, EB⊥DF)
5. ΔDEB ≅ ΔFEB (RHS)
6. DB = FB (corresponding ∠s of ≅ Δs)
7. ∠EFB = ∠CBF; ∠EDB = ∠ABD (alternate interior angles, AC║DF)
8. ΔABD ≅ ΔCBF (SAS)
The largest dimension of the enlarged photo will be: Width= 175 inches and Length= 245 inches.
<u><em>Explanation</em></u>
Dimension of the original photo is 5×7 . That means the ratio of the width to the length is 5 : 7
So, lets assume the width is
and length is
for the enlarged photo.
Formula for the perimeter of a rectangle 
As the perimeter of the enlarged photo should not exceed 840 inches, so...

That means the maximum value of
must be 35.
So, the largest possible width
inches
and the largest possible length
inches
Answer:
15:2 or 15 to 2
Step-by-step explanation:
They are asking for a ratio based on how many chaperones per student (in this case 15 students) In other words 15 students for every 2 chaperones.
Answer:
d. a combination of operations on letters and numbers
Step-by-step explanation:
b is a variable and c can be all sort of things
It’s the distributive property.
Two equivalent expressions are multiply 12+4x by 2= 24+8x, and divide 12+4x by 2= 6+2x