Answer:
$6.66
Step-by-step explanation:
You just take $19.99 and divide it by 3. Your answer is then 6.663.
Answer:

they're all like terms so we just add and subtract
The quantities in the proportion you give add to 16 pounds, of which 2 pounds are cement. That is, cement constitutes 1/8 of the total weight.
For each yard of concrete, 4000 lb/8 = 500 lb of cement are used.
For 12.5 yards of concrete, 12.5 * 500 = 6,250 pounds of cement will be used.
_____
"yard" in this case is shorthand for "cubic yard".
Answer: A then 0.700 .7 .70
Step-by-step explanation: