Answer:
76%
Step-by-step explanation:
Let f represent the score on the final. Then Inara wants the final grade to be ...
0.25·74 +0.20·99 +0.55·x ≥ 80
38.3 +0.55x ≥ 80
0.55x ≥ 41.7
x ≥ 41.7/0.55 ≈ 75.82
Inara needs a final exam grade of 76% or better to earn at least 80% in the course.
Answer:
x=34
Step-by-step explanation:

Answer:
60
Step-by-step explanation:
60 plus 60 plus 60 is 180
has to add up to 180
Ok so we know that in ONE second, the dam releases 40000 gallons of water. In ONE minute, there are 60 seconds. Therefore...
1 second----------------40000 gallons
60 seconds--------------? ( this is what we're trying to find.
To get from 1 to 60, we multiplied by 60. Now we do it on the other side. 40000 times 60 is 2,400,000, so the rate in gallons per minute is 2,400,000 gallons per minute
For this case we have to:
x: Let the variable representing the unknown number
We algebraically rewrite the given expression:
Eleven more than four times a number, is represented as:

The number less 7, is represented as:

Thus, the complete expression is:

We subtract x from both sides of the equation:

We subtract 11 from both sides of the equation:

Equal signs are added and the same sign is placed:

We divide by 3 on both sides of the equation:

Answer:
