Kenny bought 20 packs of baseball cards. There are 12 cards in each pack. How many cards did Kenny buy?
Answer:
240
Step-by-step explanation:
20 x 12 = 240
An architect is building a scale model of an office building. The scale used to build the model is 1
120
.
HELP ME WILL GIVE BRAINLIEST, FIVE STARS ,AND THANK THEM. What is the equivalent decimal value for this scale?
0.008
0.008 ModifyingAbove 3 with bar
0.8 ModifyingAbove 3 with bar
0.00 ModifyingAbove 83 with bar
Answer:
0.008 3 with bar
Step-by-step explanation:
the line under 8 is supposed to be over 8
i know im late sorry
Answer:
0.0008 ModifyingAbove 3 with bar
Step-by-step explanation:
$16.20 per hour for 40 hours and time and a half for 8 hours. What is the total pay?
Answer:
Add 16.20+ 40+8
Step-by-step explanation: 16+20+40+8= 84
What is the inverse function of f(x)= x/x-2
Answer:
f-1(x)=2x/x-1
Step-by-step explanation:
question 2 I mark as brainliest
Answer:
D: 3x(4+6)
Step-by-step explanation:
it tells you that you need to add 4 and 6 and then multipy the SUM of that by 3. so you would need to have the 4+6 in parenthesis and then multiply the 3 later
A submarine is positioned –1525 feet in relation to sea level. The submarine needs to be –1865 feet below sea level in 20 minutes. Which best represents the rate at which the submarine needs to travel?
–169.5 ft/min
–17 ft/min
17 ft/min
169.5 ft/min
john needs 480 pounds of dough to make 40 extra large pizzas.how much dough is needed to make 50 extra large pizzas?
What is 2x(x-6) = 10 in standard form of quadratic equations
Step-by-step explanation:
2x(x-6)=10
use foil method so 2x times x-6 magiging 2x²-12x
tas yung +10 itratranspose mo magiging -10 kasi kapag nagtratranspose ang positive magiging negative and vice versa, so ang sagot ay
2x²-12x-10=0
a=2
b=-12
c=-10
Two object that are similar have the same
Answer:
Two objects are similar if they have the same shape,or one has the same shape as the mirror image of the other.
Hope that helped :3
NEED THESE ASAP I have no idea what this is
Answer:
1) variables
2)26
3)8x+2y+2
4)38
I REALLY NEED HELP!!!
5^-3=
Answer:
[tex]\frac{1}{125}[/tex]
Step-by-step explanation:
whenever you see a negative exponenet, you should always write the reciprocal of it
[tex]5^{-3}[/tex] becomes [tex]\frac{1}{5^{3} }[/tex]
solve the denominator
[tex]5^{3}[/tex] = 125
therefore, your answer is [tex]\frac{1}{125}[/tex]
hope this helps!! :)
give three examples of turning force that we can see it our day to day life
Answer:
A person pushing a swing will make the swing rotate about its pivot.
A worker applies a force to a spanner to rotate a nut.
A person removes a bottle's cork by pushing down the bottle opener's lever.
A force is applied to a door knob and the door swings open about its hinge.
Please Please Please help me with this! I am so confused, I have no idea how to do it. I will make you brainiest!
Answer:
a. -29
b. 16
c. -6
d. 23
e. ?
f. x = -5
g. x = -24
h. x = 4
i. -29
j. 16 i think
Step-by-step explanation:
divede decimals by a whole number in this question 2.6÷2
Answer:
Step-by-step explanation:
2.6 ÷ 2 = 1.3
A birthday celebration meal is $49.20 including tax, but not the tip. Find the total cost if a 15% tip is added to the cost of the meal.
Answer:
$7.38
Step-by-step explanation:
multiply 49.20 by 15 percent.
Amal can run 1/8 mile in 1 1/2 minutes. If he can maintain that pace, how long will it take him to run 1 mile?
Answer:
the answer would be 12 minutes
Step-by-step explanation:
Please help a and b, Solve each system of equations algebraically.
Answer:
I hope this answer is Wright
Henry ran 5/6 of a mile this morning. Sharon only ran 2/3 of a mile. How much more did Henry run than Sharon?
Answer:
2 miles.
Step-by-step explanation: Hopefully this helped!
Answer:
1/6 more
Step-by-step explanation:
find the common denominator which gives you 4/6, rest is self explanatory, 5/6 is 1/6 more than 4/6
On New year's Eve the times square ball is lowers 47 ft every 20 seconds how long does it take for the ball to be lower 141 ft
Answer:
1 minute
Step-by-step explanation:
141/47=3. then 3*20=60 which is equal to one minute
An x-box cost $230 but is discounted 18%. What is the new cost of the x-box?
Answer:
41.4$
Step-by-step explanation:
10% of 230 is 23$
23/5=4.6
4.6$=2%
18.4$=8%
23+18.4$
41.4$
Answer:
41.4
Step-by-step explanation:
Hope this helped
Jane's flight to an all-star track meet was cancelled due to a storm. The airline gave Jane a
voucher for $10 to spend at any vendor in the airport. Jane can only use the voucher at one
vendor and, according to the voucher rules, no change will be given. Any money not spent on
the voucher is lost. If a bottle of soda costs $2.50 plus an additional 6% sales tax, how many
bottles of soda could Jane buy? *
Answer:
3
Step-by-step explanation
3 x 2.50 = 7.50
7.50 x 0.06 = 0.45
7.50 + 0.45 = 7.95
So, she would be able to buy 3 sodas and it would cost $7.95
FOR 100 POINTS please answer asap and if you don't know plz don't answer. Thank you A scuba diver was exploring a reef 39.6 m below sea level. The diver ascended to the surface at a rate of 8.8 m/min. distance = rate(time)
a) How is 39.6 m below sea level displayed as rational number? ( 3pts)
b) How long did it take the diver to reach the surface? (4pts)
Answer:
A)
[tex]-39.6[/tex]
B)
[tex]4.5\text{ minutes}[/tex]
Step-by-step explanation:
We know that the scuba diver is exploring a reef 39.6 meters below the sea level.
Remember that sea level is always 0 meters in elevation.
We also know that the diver ascended to the surface at a rate of 8.8 meters per minute.
Part A)
Since sea level is the 0th meter, anything below this will be negative.
So, since the diver is 39.6 meters below sea level, we can express this as:
[tex]-39.6[/tex]
Part B)
We know that the diver ascends at a rate of 8.8 meters per minute.
The diver is currently at 39.6 meters.
Remember that the surface is the sea level. So, we want to find after how many minutes m does the diver reach the 0th meter.
So, we can write the following equation and solve for m:
[tex]-39.6+8.8m=0[/tex]
The -39.6 represents the diver's current altitude.
The 8.8m represents the diver's rate of ascending 8.8 meters per minute m. Notice that 8.8m is positive because we're ascending.
And the 0 represents the 0th meter or sea level or the surface.
So, solve for m. Add 39.6 to both sides:
[tex]8.8m=39.6[/tex]
Divide both sides by 8.8. So:
[tex]m=4.5[/tex]
So, it will take the diver 4 and a half minutes to reach the surface.
And we're done!
please helpppp
The length of a book (in pages) is a function of
the number of words in the book. This function
is written /(w). What is true about this function?
Circle the best answer.
Answer Choices:
(20,000) is the length of a book with 20,000
pages.
|(140) describes a book with 140 pages.
|(15,055) is the number of pages in a book with
15,055 words.
Answer:
|(15,055) is the number of pages in a book with
15,055 words.
Step-by-step explanation:
becuz the no of pages is a function to the words ..
substract the polynomials and simplify (-3r2-2r-4)-(9r2+7r+2)
Answer:
-12r2-9r-6
Step-by-step explanation:
-distribute the subtraction symbol to the second group of numbers
-(9r2+7r+2) = (-9r2-7r-2)
-then combine each term together (-3r2-2r-4)+(-9r2-7r-2)
= -12r2-9r-6
HOPE THIS HELPS!!
n - 8 + n = 1 - 4n
solve for n
Your percent grade varies directly with the number of correct answers. You got a
grade of 80 when you had 20 correct answers, What would your percent grade
be with 24 correct answers?
96%
help!!!
Answer:
96%
Step-by-step explanation:
20/ 0.80 = 25 (total number of questions)
24/25 = .96 x 100 = 96%
An online music store is offering a promotion. When you spend $45 or more, you receive 3 songs for free. You buy an album for $15. Identify the inequality that represents how much more money m you must spend to receive the three free songs. 15+m≥45
15+m>45
45+m≥15
15+m≤45
Question 2 How much more must you spend to receive the three free songs? You must spend ____ more.
Answer:
When you spend $45 or more, you get 3 free songs.
You already spent $15.
Then, if we define m as the amount that you need to spend in order to get the 3 free songs, the minimum value of m will be such that you spend exactly $45 in total.
$15 + m = $45.
But if you spend more than $45 you also get the songs, so the inequality that represents this situation is:
$15 + m ≥ $45.
2)Solving the equation for m we have:
m ≥ $45 - $15 = $30
m ≥ $30.
So the minimum amount that you can spend in order to get the songs is when the equality is true, this means that:
m = $30 is the minimum that you must spend if you want the 3 free songs.
Divide. Write the quotient in lowest term 4 4/5 ÷1 1/2
Answer:
3 1/5
Step-by-step explanation:
24/5 ÷ 3/2
24/5 x 2/3
48/15
16/5
3 1/5
An object with mass of 1 kg, specific heat of 1000 J/kg°C, surface area of 0.01 m2, and initial temperature of 25°C is placed in a microwave oven with internal temperature of 25°C and heat transfer coefficient of 40 W/m2°C.If the microwave heat input into the object is 50 W,
a) Show that the differential equation that governs the temperature change forthis object is
dT/dt+0.0004T = 0.06
b) Solve this differential equation and find out what the temperature of this object is after 200 seconds heating inside the microwave.
Answer:
a) True. The differential equation is [tex]\frac{dT}{dt}+0.0004\cdot T = 0.06[/tex], where [tex]T[/tex] is measured in Celsius.
b) The temperature of the object after 200 second inside the microwave is approximately 34.611 ºC.
Step-by-step explanation:
a) The object is heated up by convection and radiation, from First Law of Thermodynamics we get that energy interactions on the object are represented by:
[tex]-\dot Q_{out} + \dot W_{in} = \frac{dU_{sys}}{dt}[/tex] (Eq. 1)
Where:
[tex]\dot Q_{in}[/tex] - Heat transfer rate to the object, measured in watts.
[tex]\dot W_{in}[/tex] - Electric power given by the microwave owen, measured in watts.
[tex]U_{sys}[/tex] - Internal energy of the object, measured in watts.
Then, we expand the expression by means of definition from Heat Transfer and Thermodynamics:
[tex]-h_{c}\cdot A_{s}\cdot (T-T_{\infty})+\dot W_{in} = m\cdot c\cdot \frac{dT}{dt}[/tex]
Where:
[tex]h_{c}[/tex] - Heat transfer coefficient, measured in watts per square meter-Celsius.
[tex]A_{s}[/tex] - Surface area of the object, measured in square meters.
[tex]T[/tex] - Temperature of the object, measured in Celsius.
[tex]T_{\infty}[/tex] - Internal temperature of the microwave oven, measured in Celsius.
[tex]m[/tex] - Mass of the object, measured in kilograms.
[tex]c[/tex] - Specific heat of the object, measured in joules per kilogram-Celsius.
After some algebraic handling, we get this non-homogeneous first order differential equation:
[tex]\frac{dT}{dt} = -\frac{h_{c}\cdot A_{s}}{m\cdot c} \cdot (T-T_{\infty}) + \frac{\dot W_{in}}{m\cdot c}[/tex]
[tex]\frac{dT}{dt}+\frac{h_{c}\cdot A_{s}}{m\cdot c}\cdot T =\frac{h_{c}\cdot A_{s}}{m\cdot c}\cdot T_{\infty}+\frac{\dot W_{in}}{m\cdot c}[/tex] (Ec. 2)
If we know that [tex]h_{c} = 40\,\frac{W}{m^{2}\cdot ^{\circ}C}[/tex], [tex]A_{s} = 0.01\,m^{2}[/tex], [tex]m = 1\,kg[/tex], [tex]c = 1000\,\frac{J}{kg\cdot ^{\circ}C}[/tex], [tex]T_{\infty} = 25\,^{\circ}C[/tex] and [tex]\dot W_{in} = 50\,W[/tex], the differential equation is:
[tex]\frac{dT}{dt}+0.0004\cdot T = 0.06[/tex]
b) The solution of this differential equation is:
[tex]T(t) = T_{o}\cdot e^{-0.0004\cdot t}+ \frac{0.06}{0.0004}\cdot (1-e^{-0.0004\cdot t})[/tex]
Where [tex]T_{o}[/tex] is the initial temperature of the object, measured in Celsius.
[tex]T(t) = T_{o}\cdot e^{-0.0004\cdot t}+150\cdot (1-e^{-0.0004\cdot t})[/tex]
[tex]T(t) = 150+(T_{o}-150)\cdot e^{-0.0004\cdot t}[/tex]
Where [tex]t[/tex] is the time, measured in seconds.
If we know that [tex]T_{o} = 25\,^{\circ}C[/tex], then:
[tex]T(t) = 150-125\cdot e^{-0.0004\cdot t}[/tex] (Ec. 3)
For [tex]t = 200\,s[/tex], we get that temperature of the object is:
[tex]T(200) = 150-125\cdot e^{-0.0004\times 200}[/tex]
[tex]T(200) \approx 34.611\,^{\circ}C[/tex]
The temperature of the object after 200 second inside the microwave is approximately 34.611 ºC.
the sum of 5 times a number and 23
Answer:
5n+23
Step-by-step explanation:
five times a number is 5n and 23 is +3