Answer:

Step-by-step explanation:
We need to find the fractional amount of the total that is 2d and 4d size nails.
It is given 2d nails are 2/4th of the total. Also
It is given 4d nails are 1/4th of the total.
Hence 2d and 4d comprises of 2/4 + 1/4 = 3/4th of the total
so, 2d and 4d is 3/4th of the total
Answer:
si
Step-by-step explanation:
si :v
85=d/3.75
d = 85 x 3.75
d = 318.75
Answer:
Step-by-step explanation:
2x3+7x3=
6+21=
27ft
So let's simplify the equation first.
9x + 12 - 5 = ax + b
9x + 7 = ax + b
9x - ax - b = 7
Alright now plug in the numbers for each option.
I don't feel like doing all of them but I did A (one solution) and B (no solution because the two 9x's cancel out).