Answer:
B
Step-by-step explanation:
The sum of 3.4a + -3.5a is..
3.4
+-3.5
-------
- .1a
It is negative because -3.5 is grater than positive 3.4
The bag of dog food would last for 21 days.
The bag contains 42 cups of dog food. If the dog eats
cups everyday, the amount of cup in the bag decreases by
cups everyday. This can be represented with this expression: 42 -
d. Where d represents the number of days.
In order to determine the number of days in which the bag would be emptied, this equation can be used:
Number of days the dog food would last = number of cups in the cup / amount the dog eats each day
42 ÷
42 ÷ 
42 x
= 21 days
To learn more, please check: brainly.com/question/11801850?referrer=searchResults
Answer:
Angle HFG + angle ACB = 90°
Angle EFC = Angle DFG
Angle HFG + angle DFH = angle DFG
= 90°
The answer is B Angle DFH = angle ACB
Hope this helps!