1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mrac [35]
3 years ago
13

Jeffrey purchase and download 12 songs on Monday he purchase an additional 3 songs on Tuesday the cost to download each song is

$2 write a numeral expression to represent the situation
Mathematics
1 answer:
bonufazy [111]3 years ago
4 0
(12x3)+(3x2) Because on Monday he bought 12 songs for $3 each and on Tuesday he bought 2 songs for $3 each.
You might be interested in
What kind of problems could be solved with GCF and LCM
Thepotemich [5.8K]

Answer:

word problems

4 0
3 years ago
Read 2 more answers
The sales tax on a $24 model rocket is $1.92 what is the percent of sales tax
AleksAgata [21]

Input data

Price model rocket = $24

Tax = $1.92

What is the percent of sales tax?

Procedure

r = percent of sales tax

r=\frac{1.92}{24}=0.08=8\text{ \%}

The answer would be 8%

8 0
1 year ago
Sam ran 3 1/2 miles in 25 minutes. If he continues running at this pace how far will he run in 1 hour
zheka24 [161]

Answer: 8.4 or 8 2/5

Step-by-step explanation:

3 1/2 for 25 minutes and 0.14 miles per minute so 0.14 * 60 since there are 60 minutews in a hour and you get ur answer.

5 0
2 years ago
Read 2 more answers
A 500-gallon tank initially contains 220 gallons of pure distilled water. Brine containing 5 pounds of salt per gallon flows int
Wittaler [7]

Answer: The amount of salt in the tank after 8 minutes is 36.52 pounds.

Step-by-step explanation:

Salt in the tank is modelled by the Principle of Mass Conservation, which states:

(Salt mass rate per unit time to the tank) - (Salt mass per unit time from the tank) = (Salt accumulation rate of the tank)

Flow is measured as the product of salt concentration and flow. A well stirred mixture means that salt concentrations within tank and in the output mass flow are the same. Inflow salt concentration remains constant. Hence:

c_{0} \cdot f_{in} - c(t) \cdot f_{out} = \frac{d(V_{tank}(t) \cdot c(t))}{dt}

By expanding the previous equation:

c_{0} \cdot f_{in} - c(t) \cdot f_{out} = V_{tank}(t) \cdot \frac{dc(t)}{dt} + \frac{dV_{tank}(t)}{dt} \cdot c(t)

The tank capacity and capacity rate of change given in gallons and gallons per minute are, respectivelly:

V_{tank} = 220\\\frac{dV_{tank}(t)}{dt} = 0

Since there is no accumulation within the tank, expression is simplified to this:

c_{0} \cdot f_{in} - c(t) \cdot f_{out} = V_{tank}(t) \cdot \frac{dc(t)}{dt}

By rearranging the expression, it is noticed the presence of a First-Order Non-Homogeneous Linear Ordinary Differential Equation:

V_{tank} \cdot \frac{dc(t)}{dt} + f_{out} \cdot c(t) = c_0 \cdot f_{in}, where c(0) = 0 \frac{pounds}{gallon}.

\frac{dc(t)}{dt} + \frac{f_{out}}{V_{tank}} \cdot c(t) = \frac{c_0}{V_{tank}} \cdot f_{in}

The solution of this equation is:

c(t) = \frac{c_{0}}{f_{out}} \cdot ({1-e^{-\frac{f_{out}}{V_{tank}}\cdot t }})

The salt concentration after 8 minutes is:

c(8) = 0.166 \frac{pounds}{gallon}

The instantaneous amount of salt in the tank is:

m_{salt} = (0.166 \frac{pounds}{gallon}) \cdot (220 gallons)\\m_{salt} = 36.52 pounds

3 0
3 years ago
If 3/4=x/2 then 7/4=
wariber [46]
I don’t know

I need to answer a question I'm new sorry
8 0
3 years ago
Other questions:
  • Which equation represents a linear function?
    10·1 answer
  • Calculate: 2.7·6.2–9.3·1.2+6.2·9.3–1.2·2.7<br> not pemdas. some shortcut method plz
    15·2 answers
  • What is the volume of this cone ?
    5·2 answers
  • Ms.Discher is 5.5 feet tall and Her shadow is 4 feet long.How tall is the tree in her yard?
    14·1 answer
  • A box contains five balls numbered 1, 2, 3, 4, 5. Three balls are drawn randomly at the same time from the box.
    13·1 answer
  • Four friends go to the movies and split the total cost between them the total is 17.28 for movie tickets and 13.68 for snacks ho
    8·1 answer
  • Evaluate the following expression.
    10·1 answer
  • Progress:
    11·1 answer
  • Which on the graph is not possible to produce?
    14·1 answer
  • Miles works for a boat shop and needs to make at least $200 to pay his bills this month. He receives one-eighth of his total sal
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!