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Natali [406]
3 years ago
15

I NEED HELP NOW PLZ!!!

Mathematics
2 answers:
Kobotan [32]3 years ago
7 0
Answer is D for sure
vazorg [7]3 years ago
6 0

a function should have one mapping so the answer is D

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Problem 9
lapo4ka [179]

Answer:

3:36PM

Step-by-step explanation:

Leon starts at 12PM with 12 gallons of gas, and after 2 hours he has used 5 gallons of gas. This means that every 2 hours he uses 5 gallons of gas.

Next we will find at what point Leon will stop to get gas. Since he will stop when the tank is at \frac{1}{4} capacity, we can use the equation:

\frac{1}{4} * 12 = \boxed{3}

This shows \frac{1}{4} of his tank's capacity (12) is equal to 3 gallons. This means he will stop for gas when 3 gallons are remaining.

Now we need to find how many gallons of gas he uses, but as a unit rate. (This will allow us to find what time Leon will stop to get gas.) To find the unit rate, we will need to find how many gallons of gas he uses per hour.

\frac{\mbox{5 gallons}}{\mbox{2 hours}} = \frac{\mbox{2.5 gallons}}{\mbox{1 hours}}

This is a simple proportion, and now we know he uses 2.5 gallons of gas per hour.

Now we can how many hours of gas Leon has left.

He has 7 gallons of gas left at 2PM, so we can divide to find how many hours left of gas he has.

\frac{7-3}{2.5} = 1.6

The 7-3 is because Leon doesn't stop when his tank is empty, he stops 3 gallons earlier. We are dividing by 2.5 because that is how much gas he uses per hour, meaning the result of this division (1.6) is how many hours he has left.

Now we can solve for what time Leon will stop to get gas.

12PM + 2 hours of driving + the remaining 1.6 hours = 3:36PM

(1.6 hours is equal to 1 hour and 36 minutes)

Therefore, Leon will stop for gas at 3:36PM

8 0
2 years ago
Researcher Sandy Beach found a correlation coefficient of +2.3 between variables X and Y. She is thrilled because that correlati
tia_tia [17]
Correlation coefficient is always between -1 and +1. So it cannot be +2.3
7 0
3 years ago
Which expression is equivalent to -2-7?
quester [9]

Answer:7

Step-by-step explanation:

just because

3 0
3 years ago
Read 2 more answers
Describe the transfomations for f(x) = - ( x - 3 )2 + 4.
Natali [406]

Answer:

2(5 p - 1)/p2

Step-by-step explanation:

All I had to do was look u a transformation calculator and put the equation in and it transformed into that answer

8 0
2 years ago
I need help plotting before 7:00.
Lemur [1.5K]

J: (4,0)

M:(-1,1)

E:(4,-1)

X:(1,0)


5 0
3 years ago
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