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Tju [1.3M]
3 years ago
8

Select Is a Function or Is not a Function to correctly classify each relation.

Mathematics
1 answer:
hjlf3 years ago
3 0
1. Is a function
2. Is a function
3. Is a function
4. Is not a function
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A 120-watt light bulb uses about 0.1 kilowatt of electricity per hour. If electricity costs $0.20 per kilowatt hour, how much do
saveliy_v [14]
There is no such thing as a "kilowatt per hour". If that's actually what the question says, then it's a defective question, and you should put it away before it makes you any more confused. A 120 watt light bulb uses exactly 0.12 kilowatt when it's turned on. In one hour, it uses (0.12 kilowatt) x (1 hour) = 0.12 kilowatt-hour of energy. If energy costs $0.20 per kilowatt-hour, then the cost is (0.12) x (0.20) = 2.4 cents. (0.024 dollar)
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3 years ago
Which is f(-3) for quadratic function graphed
liberstina [14]
The -3 in f(-3) is the X coordinate, so you need to find where the line is on the Y coordinate at that point.

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3 0
3 years ago
A dog walker charges a flat rate of $6 per walk plus an hourly rate of $30. How much does the dog walkercharge for a 45 minute w
leonid [27]

hello

from the question given, the dog walker charges a flat rate of $6 and an extra $30 per hour.

we can write out an equation in function notation

let the number of hours be represented by x

f(x)=6+30x

now we can proceed to solve the cost of the walk for 45 minutes

\begin{gathered} 1hr=60\min s \\ \text{xhr}=45\min s \\ x=\frac{45}{60} \\ x=\frac{3}{4} \\ \text{therefore 45mins = 3/4 hours} \end{gathered}

now we can input the value into the equation and know the cost for 45 minutes walk

\begin{gathered} f(x)=6+30x \\ x=\frac{3}{4} \\ f(x)=6+30(\frac{3}{4}) \\ f(x)=6+22.5 \\ f(x)=28.5 \end{gathered}

from the calculation above, the cost of 45 minutes walk will cost $28.5

6 0
1 year ago
You start at 1, 4. You move left five units and down seven units. where do you end?
ololo11 [35]
-4,3 i think that’s the answer
6 0
2 years ago
Read 2 more answers
Solve the inequality for x+9<10
Strike441 [17]

Answer:

x < 1

Step-by-step explanation:

x+9<10

Subtract 9 from each side

x+9-9<10-9

x < 1

7 0
3 years ago
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