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ad-work [718]
3 years ago
9

An online store sells DVDs for $10 each. The shipping charge for an entire order is $5.50. Frank orders d DVDs. Write an express

ion that represents the total cost of Frank's DVDs
Mathematics
2 answers:
AlekseyPX3 years ago
8 0
10d+$5.50 = Frank$ money that needs to be paid.
kramer3 years ago
7 0

Answer:

total cost = 10d +5.50

Step-by-step explanation:

Hi, to answer this question we have to write an equation with the information given:

So, the total cost is the sum of the shipping cost (5.50) and the product of the cost of each DVD (10) and the number of DVDs ordered (d)

Mathematically speaking:

Total cost = 10d +5.50

Feel free to ask for more if needed or if you did not understand something.

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A cylinder has a diameter of 24 inches. If its height is half its radlus, what is the volume of the cylinder in cubic Inches?
ella [17]

Answer:

about 2714.34 in^3

Step-by-step explanation:

24/2=12--radius

12/2=6--height

formula is V=(pi)(r^2)(h)

r is for radius and h is for height

V=(pi)(12*12)(6)

V=(pi)(144)(6)

V=(pi)(864)

V= about 2714.34 in^3

4 0
3 years ago
The product of two of three numbers is 7.8. if one number is 3/5, find the other number ( if you don't know please don't answer)
yarga [219]

Answer: 13,I

Step-by-step explanation:

set the 3 number is 3/5, x,y

product of them

3 /5 xy = 7:6

xy = 7:6 x 5 /3

Xy = 13

So the two number is 13, 1

Step-by-step explanation: hope this helped, Meow!

3 0
3 years ago
If n represents a number, then write an expression for the difference of three times the number after it was increased by 3 and
faust18 [17]
• Increased by 3
n+3
• Twice the number
2(n+3)
• Three times the number
3n
• Final result
2(n+3)-3n
5 0
3 years ago
The pregnancy length in days for a population of new mothers can be approximated by a normal distribution with a mean of 269 day
fenix001 [56]

Answer:

a) 279 b)254

Step-by-step explanation:

Mean = 269 days

standard deviation = 8 days

let n be the pregnancy lenght.  

using normal distribution formula

z = (n – mean)/ standard deviation

n = z * standard deviation + mean

Now, z values for the top 12% has to be found using a z table.

The top 12% means 88% of area under the curve. In this case z = 1,176

n = 1,176 * 8 + 269

n = 278.4 = 279

The bottom 3% means 97% of area under the curve. In this case z = -1,882

n = -1,882 * 8 + 269

n = 253.94 = 254

6 0
3 years ago
The temperature T in degrees Celsius of a liquid t minutes after heating is given by the formula T=8√t. When is the temperature
Advocard [28]
T=8√t
T=temperature
t=time in minutes.
If T=48, we have to calculate the time.

48=8√t
(48)²=(8√t)²
2304=64t
t=2304 / 64=36

answer: 48 degrees Celsius will be reached in 36 minutes. 
3 0
3 years ago
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