BD=7x-10
Answer: x=bd/7 + 10/7
BC=4x-29
Answer: x=Bc/4 + 29/4
CD=5x - 9
Answer: x= cd/5 + 9/5
Answer:

Step-by-step explanation:
Given : One nanometer equals about 0.00000004 inches.
To find : When writing this decimal as a single-digit integer multiplied by a power of ten, the single digit integer is and the power of ten ?
Solution :



Therefore, the decimal as a single-digit integer multiplied by a power of ten is 
Answer:
The required equation is
d = 4c
where d represents the cost of cookies in dollar and c represents the number of boxes of cookies.
Step-by-step explanation:
Given that, the cost of each box of cookies is $4.
It means,
The cost of 1 box of cookies is $4.
The cost of 2 boxes of cookies is $(4+4) =$(2×4)
The cost of 3 boxes of cookies is $(4+4+4) =$(3×4)
The cost of cookies
=(Number of boxes × 4)
The required equation is
d = 4c
where d represents the cost of cookies in dollar and c represents the number of boxes of cookies.