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andrew11 [14]
3 years ago
6

Jimmy is selling used books at a yard sale. A customer buys 9 books at a cost of $0.75 each and pays with a $20.00 bill. Jimmy m

ust determine c, the amount of change in dollars he should give the customer. Which equation represents c?
​
Mathematics
2 answers:
nika2105 [10]3 years ago
6 0

Answer:

c = $20.00 - $0.75(9)

Step-by-step explanation:

Multiply the cost of each book by the total number of books. Then, subject that from 20.

yanalaym [24]3 years ago
5 0

Answer:

$13.25

Step-by-step explanation:

hope this helps

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Y_Kistochka [10]

Answer:

B: shift vertically up by 3

Step-by-step explanation:

I suggest using desmos graphing for future questions like these

Hope this helps :)

6 0
3 years ago
The power generated by an electrical circuit (in watts) as a function of its current x xx (in amperes) is modeled by P ( x ) = −
marysya [2.9K]

Given:

The power generated by an electrical circuit (in watts) as a function of its current x (in amperes) is modeled by

P(x)=-15x(x-8)

To find:

The current which will produce the maximum power.

Solution:

We have,

P(x)=-15x(x-8)

P(x)=-15x^2+120x

Differentiate with respect to x.

P'(x)=-15(2x)+120(1)

P'(x)=-30x+120      ...(i)

To find the extreme point equate P'(x)=0.

-30x+120=0

-30x=-120

Divide both sides by -30.

x=4

Differentiate (i) with respect to x.

P'(x)=-30(1)+(0)

P'(x)=-30 (Maximum)

It means, the given function is maximum at x=4.

Therefore, the current of 4 amperes will produce the maximum power.

7 0
3 years ago
Mark Borrowed $5,500 at 11.5 percent for 5 years (2.199) what is the amount of Marks total payment?
Airida [17]
Let I am interest, r rate, t time and p principle,

l= prt

l= 5500(.115)(5 )= $3162.5 is the total amount of interest to pay.


4 0
3 years ago
Read 2 more answers
1 1/2= v + 3/4 (that's 1 and a half, not 11 over 2)<br> what is v?
Irina-Kira [14]

Answer:

The value of v is 3/4.

Step-by-step explanation:

First, you have to convert mixed number into improper fraction :

1 \frac{1}{2} \\  =  \frac{2 \times 1 + 1}{2}  \\  =  \frac{3}{2}

In order to find the value of v, you have to substract 3/4 to both sides :

\frac{3}{2}  = v +  \frac{3}{4}

\frac{3}{2}  -  \frac{3}{4}  = v +  \frac{3}{4}  -  \frac{3}{4}

v =  \frac{3 \times 2}{2 \times 2}  -  \frac{3}{4}

v =  \frac{6}{4}  -  \frac{3}{4}

v =  \frac{3}{4}

8 0
3 years ago
Read 2 more answers
In a class of 54 students there are 6 more girls than boys. What is the ratio of the number of boys to the numbers of girls
OLEGan [10]

Answer:

6:54?

Step-by-step explanation:

Im really sorry if it's wrong but I'm pretty sure thats the answer since its a ratio

8 0
3 years ago
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