Answer:
What caused the differences in their behavior? The food coloring in cool water remained at the bottom of the container. ... The behavior of the food coloring was caused by the movement of heat through the water and the formation of convection currents. The warmer water is less dense, so it rises to the surface.
Step-by-step explanation:
Answer:
10 - .65r
Step-by-step explanation:
you just have to combine like terms, in this case the whole numbers. 7 + 3 = 10 so yup
A line passes through the point (-8,-9) and has a slope of -3/4, write an equation in slope intercept form for this line
I need to know this ASAP. I will give you 25 Points and a brainly crown thing.
Answer:
The answer is C.
Step-by-step explanation:
The selling price of a car is $18,000. Each year, it loses 15% of its value. Find the exponential function that gives the value of the car t years after its purchase. Write your answer in the form f(t)=a(b)t.
Answer:
f(t)=18,000(0.85)^t
Step-by-step explanation:
18,000 is the a value, and since it is depreciating 15% becomes -.15
so we are going to set it up like f(t)=18,000(1-0.15)^t
Final answer is f(t)=18,000(0.85)^t
The exponential function that gives the value of the car t years after its purchase is f(t) = $18,000(0.85^t).
What is the exponential function that represents the value of the car?
The car would cost less with the passage of time. This is because it loses its value with the passage of time.
The formula that can be used to determine the value of the car is:
FV = P (1 - r)^n
FV = Future value P = Present value R =rate of decline in valueN = number of yearsf(t) = $18,000 x (1 - 0.15^t)
f(t) = $18,000(0.85^t)
To learn more about exponential function, please check: https://brainly.com/question/18760477
jared needs to drill holes 2 1/4 inches apart in a 36 inch section of his garage. which expression can he use to figure out the number of holes he will need to drill
Answer: 36 / 2 1/4
Step-by-step explanation:
From the question, we are informed that Jared needs to drill holes 2 1/4 inches apart in a 36 inch section of his garage. The expression that he can use to figure out the number of holes he will need to drill will be:
= 36 ÷ 2 1/4
From the expression we can then calculate the number of hours to drill. This will be:
= 36 / 2 1/4
= 36 / 9/4
= 36 × 4/9
= 16
He'll need to drill 16 holes
Answer:
18c
= 18(36)
= 648
Step-by-step explanation:
i hope this helps and im on edmentum
pls help with this division
x^2+3x+6
Step-by-step explanation:
this is the answer I got for some reason it is not an option on your question
What is the domain and range please?
PLZ ANSWER !! DUE ASAP PLS
Answer: - 8/5
Step-by-step explanation:
M1*M2=-1
Substuting M1 as 5/8
We get
5/8*M2=-1
M2=-8/5
3(4a + 2) = 2(a - 2)?
Answer:
A= -1
Step-by-step explanation:
A meteorologist at a television station reported that a town received 0.38 in. of rain. Which fraction is equivalent to this amount of rain in inches?
Answer:
19/50
Step-by-step explanation:
38 divided by 2 since 100 divided by 2 to get 19/50
please pick brainliest.
Mrs. Daniels recorded the weights of nine boxes of strawberries in her booth at a farmer's market. The weights of the boxes
shown.
2
What is the average weight, in pounds, of the boxes of strawberries?
OB.
OA 13 pounds
1 pounds
OC. 2 pounds
OD. 2, pounds
Reset
Next
Answer:
The answer is C. 2 pounds
Step-by-step explanation:
Add all the numbers up and then divide by the numbers of sets. The average is the same as the mean.
This is for the ones on Plato
If y = –2 whenx
1, find xwhen y = 4
Answer:
x=-1/2 decimal form -0.5
Step-by-step explanation:
Multiply -2 and 1 then divide by 4,-2/4. x = −1 /2
The vehicle's fuel efficiency is at least 35 miles per gallon.
Use f to represent the vehicle's fuel efficiency (in miles per gallon).
Answer:
f ≥ 35
Step-by-step explanation:
Took the test on Aleks, it was right! :)
Kylie is preparing for the science fair that will take place in six weeks. She has three plants that she has grown from seeds, which she considers to have height 0 centimeters, and she is measuring their heights as she applies different treatments to each. The second plant is receiving Plant Food B. After 3 weeks, it is 10 centimeters tall. If it continues growing at this rate, how tall will it be after 6 weeks?
The height of plant B growing at a rate of 3.33 centimeters per week should have a height of 19.98 cms.
What are lines and their slopes?We know lines have various types of equations, the general type is
Ax + By + c = 0, and equation of a line in slope-intercept form is y = mx + b.
Where slope = m and b = y-intercept.
the slope is the rate of change of the y-axis with respect to the x-axis and the y-intercept is the (0,b) where the line intersects the y-axis at x = 0.
First we need two points (x, y) to obtain the slope.
Assuming height to be 'y' and weeks to be 'x'.
Therefore, (0, 0) and (3, 10) are the two points.
Slope(m) = (10 0)/(3 - 0).
Slope(m) = 10/3.
Slope(m) = 3.33
Now, To obtain the y-intercept.
10 = 3(3.33) + b
b = 0.01 Or neglegible.
Therefore y = 3.3x.
Now, In the 6th week, the height of plant B will be,
y = 3.33(6).
y = 19.98 or 20 cm.
learn more about lines and slopes here :
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estimate 12/26 + 6/11
Answer:
12/26 + 6/11 = 12+6/11 ............
Solve for x. Round your answer to the nearest tenth if necessary.
Answer:
69.7
Step-by-step explanation:
[tex]x^{2} + 6^{2} = 70^{2}\\x^{2} + 36 = 4,900\\4,900 - 36 = 4,864\\\sqrt{4,864}\\69.7 = x[/tex]
if a dog can eat one thirds of a bag of food in 1/2 a week how many bags of food can the dog eat in one week
Answer:
Two thirds of a bag.
Step-by-step explanation:
1/2 * 2 = 1
1/3 * 2 = 2/3
Hope this helped!
can anyone help ?\me with this algebra answer
Answer:
B) 2x-y=5
Step-by-step explanation:
Info we have:
The x-intercept is 2.5
The slope is 2/1=2
Therefore, our equation so far is y=2x+b
We plug in our x-intercept in and make y=0 to get b:
0=2(2.5)+b
0=5+b
-5=b
Therefore, the equation of the line is y=2x-5
Given our found equation, we can see which option works.
A is wrong because 2x+y=-5 -> y=-5-2x -> y=-2x-5
B is right because 2x-y=5 -> -y=5-2x -> y=-5+2x -> y=2x-5
C is wrong because x+2y=-5 -> 2y=-5-x -> y=-2.5-1/2x -> y=-1/2x-2.5
D is wrong because 2y-x=10 -> 2y=10+x -> y=5+1/2x -> y=1/2x+5
Giovanni justifies whether the expression -4x-8 is equivalent to -2(x+1)-2(x+3) by letting x=3 in both expressions. What is the value of each expression when x=3.
3 and -20
4 and 4
-20 and -20
3 and 4
Answer:
The value of each expression when x=3 will be -20 and -20.
Step-by-step explanation:
Given the expression
-4x-8
setting x=3
= -4(3)-8
=-12-8
=-20
Given the expression
-2(x+1)-2(x+3)
setting x=3
=-2(3+1)-2(3+3)
=-2(4)-2(6)
=-8-12
=-20
so we conclude that the value of both the expressions was -20 when we substituted the value x=3.
Therefore, the value of each expression when x=3 will be -20 and -20.
HELP WILL GIVE BRAINIEST AND 60 POINTS AND 5 STARS!!!! ITS DUE IN 10-15 MINUTES!!! Which of these 4 numbers are rational numbers and which one of them is the only one that is irrational? and explain why you got ur answer using math terminology or math logic
Answer:
[tex]\sqrt{21}[/tex] does not belong
Step-by-step explanation:
a rational number is defined by any number that ends or repeats.
[tex]\sqrt{36\\}[/tex] ends because it is just 6
[tex]\frac{2}{3}[/tex] repeats so it is rational
[tex]\frac{1}{5}[/tex] ends becuase it is just 0.2
but [tex]\sqrt{21}[/tex] does not end nor repeat, making it irrational
Answer:
21 is the irrational one
Step-by-step explanation:
you cant multiply to of the same whole numbers by itself and get 21
a truck that can carry no more than 6200 pounds is being used to transport refrigerators and upright pianos eat refrigerator weighs 250 pounds in each piano weighs 425 pounds right and graph an inequality to show how many refrigerators and how many pianos the truck carry what 11 refrigerators and eight panels overloaded truck explain let X the number of refrigerators in the truck y the number of pianos in the truck right in any quality to show how many refrigerators and how many pianos the truck carry
Answer:
sorry i just need points but ya
Step-by-step explanation:
Please help! due today!
Answer:
A
Step-by-step explanation:
Use pythagorean theorem: a^2+b^2=c^2
12^2+x^2=13^2
144+x^2=169
x^2=25
x=5
HTH :)
The pitch of a roof is the number of feet the roof rises for each 12 feet horizontally. If a roof has a pitch of 8, what is its slope expressed as a positive number?
2. Multiply and simplify: (x - 2)(2x + 3)
Answer
Step-by-step explanation:
(x - 2)(2x + 3)
=2x²+3x-4x-6
=2x²-x-6
Answer:
2x^2-x-6
Step-by-step explanation:
use foil,
1) x*2x=2x^2
2) x*
majikalmochi avatar
i sent too early lol
2) x*3= 3x
majikalmochi avatar
3) -2*2x=-4x
4) -2*3=-6
majikalmochi avatar
now put that all together
2x^2+3x-4x-6
simplify
2x^2-x-6
Will give brainliest if correct.
Answer:
Step-by-step explanation:
a. $7.
b. $1x.
c. $20.
d. $5y.
e. $1x + $5y.
I hope this helps, sorry if I am incorrect. Have a nice day!
How many ? Help me as soon as possible
Answer:
3 meters
Step-by-step explanation:
Distance covered in 1 second
[tex] = \frac{7.5}{2.5} \\ \\ = 3 \: m[/tex]
-3y-2=7 what is the value of y
Answer:
y = -3
Step-by-step explanation:
Add 2 to each side to isolate the -3y. Doing this leaves you with -3y=9. You then divide each side leaving you with y = -3
Answer:
The equation has one solution at which y = -3.
Step-by-step explanation:
To find the value of y, we need to isolate it from the rest of the equation.
Add 2 to both sides of the equation.Divide by -3 on both sides of the equation.Simplify the equation if necessary.[tex]\displaystyle{-3y-2=7}\\\\-3y = 9\\\\\bold{y = -3}[/tex]
We can check to make sure that y = -3 by substitution.
[tex]\displaystyle{-3(-3)-2 = 7}\\\\9-2=7\\\\7= 7 \ \checkmark[/tex]
Because we got a true statement, we can determine that y = -3.
What is the equation written in vertex form of a parabola with a vertex of (5, 7) that passes through (2, -2)?
Answer:
y = - (x - 5)² + 7Step-by-step explanation:
y = a(x - h)² + k - vertex form of the equation of the parabola with vertex (h, k)
So the equation of the parabola with vertex (5, 7):
y = a(x - 5)² + 7
The parabola passes through point (2, -2) so if x=2 then y=-2
- 2 = a(2 - 5)² + 7
- 2 -7 = a(-3)² + 7 -7
- 9 = 9a
a = - 1
So, the equation written in vertex form of a parabola with a vertex of (5, 7) that passes through (2, -2):
y = - 1(x - 5)² + 7
A watercooler contains 160 cups of water. During practice, each person on a team fills a water bottle with 3 1/3 cups of water from the cooler. How many water bottles can a team fill from a single watercooler?
Answer: Number of water bottles a team can fill from a single watercooler = 48
Step-by-step explanation:
Given: A watercooler contains 160 cups of water.
Each person on a team fills a water bottle with [tex]3\dfrac13[/tex] cups of water from the cooler.
Here, [tex]3\dfrac13=\dfrac{10}{3}[/tex]
Now , Number of water bottles a team can fill from a single watercooler = [tex]160\div \dfrac {10}3[/tex]
[tex]=160\times\dfrac3{10}\\\\=16\times3=48[/tex]
Hence, Number of water bottles a team can fill from a single watercooler = 48
Number of water bottle IT team can feel a single watercooler =48
a rectangular box of mass 40 kg has a length of 5m and a width of 8m and a height of 3 m find its density in kg/m3
Answer:
1/3 kg/m3
Step-by-step explanation:
density= mass/volume
mass=40 kg
volume=5m×8m×3m=120m³
density=40kg/120m³=1/3 kg/m³
Answer:
1/3 kg per cubic m or 0.33kg per cubic m
Step-by-step explanation:
density = mass
volume
= 40kg = 40kg
5m x 8m x 3m = 120cubic metres
= 1/3 kg per cubic m or 0.33 kg per cubic m
A health club charges $35 a month for membership fees. Determine whether the cost of membership is proportional to the number of months.
Answer:
I think that it is proportional
Step-by-step explanation: