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statuscvo [17]
3 years ago
9

Jessica is selling books during the summer, can someone help out

Mathematics
1 answer:
Elina [12.6K]3 years ago
6 0

Answer:

Option B is the answer - For each additional door she knocks on, her earnings increase by $7.

Step-by-step explanation:

The linear equation is given as :

E(x)=7x-25

Now we will check the equation by putting values of x in it.

Say if Jessica knocks 10 doors ,

E(10)=7(10)-25 = $45

If she knocks 11 doors ,

E(11)=7(11)-25 = $52

If she knocks 12 doors ,

E(12)=7(12)-25 = $ 59

Rate of change is 59-52=7

52-45=7

We can see that, there is a constant increase of $7 with each increased door she knocks.

Therefore, option B is the answer.

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A conical tank (with vertex down) is 12 feet across the top and 18 feet deep. If water is flowing into the tank at a rate of 18
Rufina [12.5K]

Answer:

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Step-by-step explanation:

7 0
3 years ago
For a school play, 739 tickets valued at $857 were sold. Some cost $1 and others cost a $1.50. How many $1 tickets were sold?
balu736 [363]

Answer:

503 $1 tickets sold.

Step-by-step explanation:

Use two equations  

Let x = number of $1 tickets sold  

Let y = number of $1.50 tickets sold  

x + y = 739  

1x + (1.5)y = 857  

First equation ==> y = 739 - x  

Plug this into the second equation  

x + (1.5)(739 - x) = 857  

x + 1108.5 - 1.5x = 857  

- 0.5x = -251.5  

x = 503  

There were 503 $1 tickets sold.  

To find the number of $1.50 tickets, just plug this value of x into either one of the equations.  

(503) + y = 739       (739 - 503 = 236)

y = 236  

There were 236 $1.50 tickets sold.

3 0
4 years ago
Suzy is starting a babysitting buisness. She spent $ 36 to make signs to advertise. She charges and intial fee of $ 6 and then $
timofeeve [1]

Answer:

3h - 30 > 0

h > 10

Step-by-step explanation:

To make a profit, subtract $36 in cost from the income coming in.

She charges $6 and then $3 per hour or 3h. Her income coming in is 6 + 3h.

Subtract 36 from it to find the profit.

3h + 6 - 36

3h - 30

To make a profit, she needs to make more than $0 or > 0.

3h - 30 > 0

Solve using inverse operations.

3h - 30 > 0

3h > 30

h > 10

3 0
3 years ago
Solve 3(x - 2) &lt; 18.<br> Please help me
lakkis [162]

Answer:

x > 8

Step-by-step explanation:

I hope this helps you out!

4 0
3 years ago
Read 2 more answers
Which choice answer is it
fomenos

Answer:

choice 1

Step-by-step explanation:

Given

V = πr²h ( isolate r² by dividing both sides by πh )

\frac{V}{\pi h} = r² ( take the square root of both sides )

\sqrt{\frac{V}{\pi h} } = r ← the positive value of r

6 0
3 years ago
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