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Andreyy89
3 years ago
15

A store is selling blank CDS in packages of 5 do $20. What is the cost of one blank CD?

Mathematics
2 answers:
DochEvi [55]3 years ago
6 0

Answer:

$4

Step-by-step explanation:

5 cds/ $20

divide both sides by 5

1 cd/$4

vovangra [49]3 years ago
3 0

Answer:

4

Step-by-step explanation:

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A large random sample of American students in seventh grade showed that 20%20\% 20% 20, percent of them were reading below grade
WITCHER [35]

Answer:

The answer is A i must took the test

Step-by-step explanation:

7 0
3 years ago
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What’s the answer to number 1 ? Show how you solved please !!!!
Elodia [21]
Dan had 52
shown work: 29 x 2=58 58-6=52
5 0
3 years ago
Can someone please help me!
vladimir1956 [14]
Hello!

To find the circumference of a circle you do 2 \pi r where r is the radius of the circle

So we do 2\pi 72

Then we substitute pi for 3.14

2 * 3.14 * 72 = 452.16 yds

Then we multiply this by 5 since he runs 5 laps

Which gives us the answer of 2260.8 yds

Hope this helps! 
6 0
3 years ago
Please help last question:((
jasenka [17]

Answer:

7. C(N(h))=33hx+460h

8. about $13.94 is the cost

Step-by-step explanation:

7. C(x)=(33x+460)(N(h))=(N(40)h)--C(x)=(33x+460)(40h)--C(x)=1320hx+18400h--simplified to C(N(h))=33hx+460h

8. C(N(10))=33(10)x+460(10)--C(N(10))=330x+4600--4600/330=about13.94

5 0
3 years ago
The function f(x)=Acosh(Cx)+Bsinh(Cx). I need help determining the value of constant C>0 when the second derivative f''(x)=25
Rus_ich [418]

Answer:

C = 5.

Step-by-step explanation:

First, you need to remember that:

For the function:

h(x) = Sinh(k*x)

We have:

h'(x) = k*Cosh(k*x)

and for the Cosh function:

g(x) = Cosh(k*x)

g'(x) = k*Cosh(k*x).

Now let's go to our problem:

We have f(x) = A*cosh(C*x) + B*Sinh(C*x)

We want to find the value of C such that:

f''(x) = 25*f(x)

So let's derive f(x):

f'(x) = A*C*Sinh(C*x) + B*C*Cosh(C*x)

and again:

f''(x) = A*C*C*Cosh(C*x) + B*C*C*Sinh(C*x)

f''(x) = C^2*(A*cosh(C*x) + B*Sinh(C*x)) = C^2*f(x)

And we wanted to get:

f''(x) = 25*f(x) = C^2*f(x)

then:

25 = C^2

√25 = C

And because we know that C > 0, we take the positive solution of the square root, then:

C = 5

6 0
2 years ago
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