Answer:
It IS balanced. There are 4 Hydrogen atoms on the left and the right and 2 Oxygen atoms on the left and the right.
Step-by-step explanation:
The given reaction follows the law of conservation of mass and is balanced. Thus, the correct option is C.
The balanced chemical equation for the reaction has been:
[tex]\rm 2\;H_2\;+\;O_2\;\rightarrow\;2\;H_2O[/tex]
The law of conservation of mass states that the mass of each element on the product and the reactant side has been equal. The mass has been proportional to the number of atoms, thus the atoms have been equal on both sides of the reaction.
In the given reaction:
The number of atoms of Hydrogen:Reactant = 4
Product = 4
The number of atoms of Oxygen:Reactant = 2
Product = 2
Since there has been the same number of atoms of each element on both sides of the reaction, the reaction has been termed a balanced reaction. The law of conservation of mass has been followed in the equation.
Thus, option C is correct.
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The scatter plot shows the number of hats and scarves each knitter sold at a knitting show.
A. 6
B. 5
C. 3
D. 1
Answer:
Option B) 5
Step-by-step explanation:
We are given the following information:
A scatter plot is given which shows the number of hats and scarves each knitter sold at a knitting show.
In the scatter plot the x-axis shows the number of hats sold and the y-axis shows the number of scarves sold.
We have to find the number of hats sold by the knitter when he sold 8 scarves.
In order to find this we have to find the x-values corresponding to the y-values of 8 scarves in the scatter plot.
Corresponding to 8 on y-axis we have a point that have a corresponding value of 5.
Hence, 5 hats were sold by the knitter when he sold 8 scarves.
Option B) 5 is the correct answer.
The scatter plot that shows the number of hats and scarves each knitter sold at a knitting show is Option B) 5
What is the scatter plotTo find the number of hats sold when 8 scarves were sold, you can look at the scatter plot and observe that there is a data point on the plot where the y-value (number of scarves) is 8, and the corresponding x-value (number of hats) is 5.
In the scatter plot the x-axis shows the number of hats sold and the y-axis shows the number of scarves sold. In order to find this we have to find the x-values corresponding to the y-values of 8 scarves in the scatter plot.
Hence, 5 hats were sold by the knitter when he sold 8 scarves.
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Emerson runs 2 miles to her friend's house and 2 miles back to her house 5 times each month. How many miles does she run?
How much money should be deposited today in an account that earns 7% compounded semiannually so that it will accumulate to $12,000 in four years?
Given rate is = 7% or 0.07
Total amount needed = $12000
Time = 4 years
Here, the deposit is compounded semiannually, means twice per year and this gives 8 annual compounding periods in 4 years.
The equation becomes:
P= [tex]\frac{12000}{(1+\frac{0.07}{2})^{2.4}}[/tex]
P = [tex]\frac{12000}{1.035^{8}}[/tex]
Solving it, we get P = $ 9112.93
Hence $9112.93 should be deposited today.
To accumulate $12,000 in four years in an account earning 7% compounded semiannually, approximately $8,289.64 should be deposited today.
Explanation:To find out how much money should be deposited today in an account that earns 7% compounded semiannually to accumulate to $12,000 in four years, we can use the formula for calculating compound interest:
A = P(1 + r/n)^(nt)
Where A is the final amount, P is the principal (initial deposit), r is the annual interest rate, n is the number of times the interest is compounded per year, and t is the number of years.
Let's substitute the given values into the formula: A = 12,000, r = 7%, n = 2 (compounded semiannually), and t = 4.Now, we can solve for P: 12,000 = P(1 + 0.07/2)^(2*4)By simplifying the equation, we get: 12,000 = P(1.035)^8Divide both sides of the equation by (1.035)^8: P = 12,000 / (1.035)^8 = 8,289.64Hence, approximately $8,289.64 should be deposited today in the account.
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Paul's mp3 player has a total of 852 songs. He has 4 different groups of songs. If he puts an equal number of songs in each group,how many songs will be in each group?
Answer:
There will be 213 songs in each group.
Step-by-step explanation:
Suppose, the number of songs in each group is [tex]x[/tex]
As he has 4 different groups of songs, so the total number of songs in all 4 groups will be: [tex](4*x)= 4x[/tex]
Given that, the mp3 player has a total of 852 songs. So, the equation will be........
[tex]4x=852\\ \\ x=\frac{852}{4}=213[/tex]
So, there will be 213 songs in each group.
Randy is checking to determine if the expressions 2x+2+4x and 2(3x+1) are equivalent. When x=3, he correctly finds that both expressions have a value of 20. When x=2, he correctly evaluates the first expression to find that 2x+2+4x=14.What is the value of the second expression when x=2 and are the two expressions equivalent?A. The value of the second expression is 7, so the expressions are not equivalent.B. The value of the second expression is 12, so the expressions are not equivalent.C. The value of the second expression is 14, so the expressions are equivalent.D. The value of the second expression is 20, so the expressions are equivalent.
Answer: c. ;]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]
help!! what is 4 3/4 divided by 2 3/4?
i THINK its 2 1/2 ?????
Which formula can be used to determine the number of different 8-letter arrangements using the letters of the word UNIVERSE?
A.
8!
B.
8P2
C.
8!/2!
D.
8!•2!
Matrix M shows the one-way fares for four commuter train routes. If the rail service raised fares by 12% on all routes and days, which formula shows how to find the matrix that would display the new fares?
A) 0.12M
B) M + 0.12
C) M + 0.12M
D) 1 + 0.12M
Answer:
C) M + 0.12M
Step-by-step explanation:
A — calculates the raise, not the new fare
B — adds 12¢ to every fare
C — adds 12% of the current fare to the current fare. This is what you want.
D — adds $1 to the amount of the raise. This is not the amount of the new fare.
Answer: C) [tex]M+0.12M[/tex]
Step-by-step explanation:
Given : Matrix M shows the one-way fares for four commuter train routes.
If the rail service raised fares by 12% on all routes and days.
Then, the proportion of service raised fares on all routes and days. =0.12
Then, the new fares is given by :-
[tex]M+0.12M[/tex]
Hence, the formula shows how to find the matrix that would display the new fares = [tex]M+0.12M[/tex]
Kim had some candy to give to her four children she fist took two pieces for herself and then evenly divided the rest among her children. Each child received four pieces. With how many pieces did she start?
simplify 9i(2+3i)
Show work
Simplify the expression
(-5+2i)(3-4i)
Show work
Simplify 4i|-28|
Answer:
9i(2+3i) = -27+18i
Step-by-step explanation:
Distribute to get → 9i·2+9i(3i)
Multiply 2 and 9 → 18i+9i(3i)
Simplify → 18i+27i²
Simplify → 18i-27
Reorder → -27+18i
Mr. Fink's economy car can travel 420 miles on a 12 gallon tank of gas. How many miles can he travel on 8 gallons?
Distance covered in 12 gallons tank of gas = 420 miles
So, distance covered in 1 gallon tank of gas = [tex]\frac{420}{12}[/tex] miles
Now, distance covered in 8 gallons will be =
[tex]8*\frac{420}{12}[/tex] =280 miles
Hence, distance covered by Mr.Fink's economy car in 8 gallons tank of gas is 280 miles.
Solve for x. Enter your answer in the box.
The sum of the measures of the angles of a hexagon is equal 720°.
Therefore we have the equation:
[tex]160^o+75^o+132^o+113^o+108^o+x^o=720^o\\\\588^o+x^o=720^o\ \ \ \ |-588^o\\\\x^o=132^o[/tex]
Answer: x = 132
Avery predicts that the number of horses, HHH, on her farm ttt years from now will be modeled by the function H(t)=25(2)^tH(t)=25(2) t H, left parenthesis, t, right parenthesis, equals, 25, left parenthesis, 2, right parenthesis, start superscript, t, end superscript, and that the amount of hay, AAA, in tons, that she produces on her farm ttt years from now will be modeled by the function A(t)=150(1.5)^tA(t)=150(1.5) t A, left parenthesis, t, right parenthesis, equals, 150, left parenthesis, 1, point, 5, right parenthesis, start superscript, t, end superscript. Let FFF be the predicted yearly supply of hay, in tons, available to each horse in Avery's farm ttt years from now. Note that the hay produced on Avery's farm is used exclusively to feed her horses. Write a formula for F(t)F(t)F, left parenthesis, t, right parenthesis in terms of H(t)H(t)H, left parenthesis, t, right parenthesis and A(t)A(t)A, left parenthesis, t, right parenthesis.
Number of Horses in Avery's farm, after t years from now is given by function H(t); where [tex]H(t) = 25(2)^{t}[/tex]
The amount of hay, in tons, that is produced on her farm t years from now is given by function A(t); where [tex]A(t) = 150(1.5)^{t}[/tex]
The predicted yearly supply of hay, in tons, available to each horse in Avery's farm t years from now is given by function F(t); where F(t) = A(t)/H(t)
So, F(t) = [tex]\frac{150(1.5)^{t}}{25(2)^{t}}[/tex] = [tex]6 (\frac{1.5}{2}) ^{t}[/tex] = [tex]6 (0.75)^{t}[/tex] tons/horse
The formula for F(t) in terms of H(t) and A(t) is F(t) = (150(1.5)^t) / (25(2)^t).
Explanation:To find the formula for F(t), we need to divide the amount of hay produced, A(t), by the number of horses, H(t). So, the formula for F(t) is F(t) = A(t) / H(t). Substituting the given functions, we have F(t) = (150(1.5)^t) / (25(2)^t).
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what is the domain of range of y=4(1/3)^x
Answer:
Domain = R
Range =(0,infinity)
Step-by-step explanation:
Given a function as
y = 4(1/3)^x
The function does not have x or y in the denominator or any square root sign.
Hence we can assign any values to x.
Domain = R = Set of all real numbers = (-infinity, infinity)
Let us consider range.
We find that 4(1/3)^x is a multiple of 4 and powers of 1/3
Since power of 1/3 is always positive, y cannot take any negative value.
When x=0 y =4.
When x tends to -infinity, y tends to 0
So y cannot take the value 0 except at -infinity.
Range =(0,infinity)
can you help me find length bc please!!!!
Remark
You are dealing with a right angle triangle. You can use one of Sin(x) Cos(x) or Tan(x). Since the Hypotenuse is involved and since you are given the adjacent side, Cos(71) is what you will need.
Solution
H = BC
Cos(x) = adjactent / hypotenuse
Cos(71) = 6.3 / H Multiply both sides by H
H * Cos(71) = 6.3 Divide by Cos(71)
H = 6.3 / cos(71) Cos(71) = 0.32557
H = 6.3 / 0.32557 Divide
H = BC = 19.351 Answer
What is each number in scientific notation?
0.00000000005
show how you got your answer
Evaluate 2d+
+32, d, plus, 3 when d=8=d equals, 8.
The value of the expression 2d + 32 is 48 when d equals 8.
The student has provided an expression 2d + 32 and the value for d is given as 8. In order to evaluate the expression, we simply need to substitute the value of d into the expression.
Evaluating the expression:
2d + 32
= 2(8) + 32
= 16 + 32
= 48.
So, the value of the expression when d = 8 is 48.
The graph represents the cost of a subscription to a newspaper.
What is the constant of variation for the subscription cost based on the number of weeks?
A. $1.50
B. $7.50
C. $15.00
D. $30.00
How can u divide whole numbers and decimals?
6. Which type of angle pair are LSM and OSN?
A. Adjacent angles
B. Linear pair
C. Complementary angles
D. Vertical angles
7. Which of the following statements are false?
A. LSM and MSN are adjacent angles
B. LSM and MSN form a linear pair of angles
C. LSM and MSN are vertical angles
D. M
8. Which angle is supplementary to LSM?
A. OSN
B. SLM
C. LMS
D. MSN
6. vertical
7. LSM and MSN are vertical angles
8. MSN
Answer:
6. Which type of angle pair are LSM and OSN?
Answer - D. Vertical angles
Vertical angles are pairs of opposite angles made by two intersecting lines.
7. Which of the following statements are false?
Answer - C. LSM and MSN are vertical angles.
Vertical angles are pairs of opposite angles made by two intersecting lines.
8. Which angle is supplementary to LSM?
Answer - D. MSN
Two angles are supplementary when they add up to become 180 degrees.
Here adding both we will get angle S as 180 degrees.
Write the prime factorization of 675 using exponent
675 : 5 = 135
135 : 5 = 27
27 : 3 = 9
9 : 3 = 3
3 : 3 = 1
675 = 5 · 5 · 3 · 3 · 3 = 5² · 3³
The table shows partial results of a survey about students who speak foreign languages.
Choose only one option
What is the relative frequency of girls who speak German to the total number of students who speak German?
A) 31%
B) 36%
C) 40%
D) 77%
Oh this is easy.I completed the table. C) 40%
THE ANSWER IS C (◡ ‿ ◡ ✿)
Leeza did this to solve an equation. Did she makes an error 4x=7+3(2x-5) 4x=7+6x-5
Yes, there was a mistake in applying the distributive property. If you have to perform
[tex] 3(2x-5) [/tex]
you have to multiply both terms in the parenthesis by 3, not just the first one.
So, the correct expansion would be
[tex] 3(2x-5) = 3\cdot 2x - 3 \cdot (-5) = 6x-15 [/tex]
Leeza made an error she did not multiply 3 into the bracket correctly. Therefore, the solution to an equation is 4.
What is an equation?In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.
The given equation is 4x=7+3(2x-5).
The solution of an equation is the set of all values that, when substituted for unknowns, make an equation true.
Now, 4x=7+6x-15
4x=6x-8
4x-6x= -8
-2x=-8
x=4
Leeza made an error she did not multiply 3 into the bracket correctly. Therefore, the solution to an equation is 4.
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Solve the following equation. Then place the correct number in the box provided. 6x - 8 = 16
ANSWER
[tex]x=4[/tex]
EXPLANATION
We have[tex]6x-8=16[/tex]
We add 8 to both sides of the equation
[tex]6x-8+8=16+8[/tex]
We simplify
[tex]6x=24[/tex]
We divide both sides by 6
[tex]x=\frac{24}{6}[/tex]
[tex]x=4[/tex]
A line that includes the point ( - 4, - 1) has a slope of - 2. What is its equation in point-slope form?
Point slope form says the line through (a,b) with slope m is
y - b = m(x - a)
Here that's
y - - 1 = -2(x - -4)
Answer: y + 1 = -2(x + 4)
Point-Slope equation: y - y₁ = m(x - x₁) ; m is slope and (x₁ ,y₁) is the coordinate
y - (-1) = -2(x - (-4)
y + 1 = -2(x + 4) simplified (two negatives make a positive)
The weight of a body varies inversely as the square of its distance from the center of the earth. If the radius of the earth is 3500 miles, how much would a 180-pound man weigh 750 miles above the surface of the earth?
The weight of the body when the distance is 750 miles if it is inversely proportional is 3,920 pounds.
How much would a 180-pound man weigh 750 miles above the surface of the earth?w = k/d²
Where,
k = constant of proportionality
w = 180 pound
d = 3,500 miles
w = k/d²
180 = k/3500²
180 = k/12,250,000
cross product
k = 180 × 12,250,000
k = 2,205,000,000
Therefore, when d = 750 miles
w = k/d²
w = 2,205,000,000 / 750²
= 2,205,000,000 / 562,500
= 3,920 pounds
Hence, the weight of the body is 3,920 pounds.
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A recipe calls for 2 cups of flour and 1 cup sugar and half cup butter how many cups of flour are needed to mix with each cup of butter
answer is equal to2:1/2=4:1
4 cups are required
Final answer:
For every cup of butter in the recipe, 4 cups of flour are needed. This is found by analyzing the ratio of flour to butter given in the recipe, which is 2 cups flour to 0.5 cup butter.
Explanation:
The question asks how many cups of flour are needed to mix with each cup of butter according to a given recipe. To determine this, we look at the provided ratios and find that the recipe calls for 2 cups of flour and 0.5 cup of butter. This results in the ratio of 4 cups of flour for every 1 cup of butter.
To calculate the amount of flour required for each cup of butter, we use a simple proportion:
0.5 cup butter : 2 cups flour
1 cup butter : x cups flour
To solve for x (the amount of flour needed for 1 cup of butter), we cross-multiply and get:
0.5x = 2
x = 2 / 0.5
x = 4
So, for every cup of butter, 4 cups of flour are needed.
How many solutions are there for the system of equations shown on the graph?
A coordinate plane is shown with two lines graphed. One line crosses the y axis at 3 and has a slope of negative 1. The other line crosses the y axis at 3 and has a slope of two thirds.
Answer:
Only one solution
Step-by-step explanation:
Given that there is a coordinate plane (say xy)
Two lines are given.
One line crosses the y axis at 3 and has a slope of negative 1.
hence equation of I line is y = -x+3
The other line crosses the y axis at 3 and has a slope of two thirds.
So equation is y = 2x/3 +3
Since the two lines lie in the same plane and are having different slopes, they intersect at one point.
Eliminate y to get
-x+3=2x/3+3
Or x=0
y=3
Hence solutionis (0,3) for the system.
Answer:
One solution
Step-by-step explanation:
we know that
The solution of the system of equations is equal to the intersection point both graphs
we have
[tex]y=-x+3[/tex] ------> equation A
[tex]y=-(2/3)x+3[/tex] ------> equation B
Using a graphing tool
see the attached figure to better understand the problem
In this problem the intersection point is only one
therefore
The system of equations has one solution
The solution is the point [tex](0,3)[/tex]
simplify: 3 times the square root of 5 - 2 times the square root of 7 + the square root of 45 - the square root of 28
2 times the square root of 12
2 times the square root of 2
six times the square root of 5 - four times the square root of 7
six times the square root of 10 - four times the square root of 14
6 on the sq rt 5 - 4 on the sq rt 7
To simplify the given expression, substitute the values of each square root and simplify the expression to get the final result of 1.416.
To simplify the given expression:
3 times the square root of 5 - 2 times the square root of 7 + the square root of 45 - the square root of 28
We can simplify each square root separately:
√5 = 2.236 (approx.)
√7 = 2.646 (approx.)
√45 = 6.708 (approx.)
√28 = 5.292 (approx.)
Substituting these values in the expression:
3(2.236) - 2(2.646) + 6.708 - 5.292
This simplifies to:
6.708 - 5.292 = 1.416
Therefore, the simplified expression is 1.416.
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Find the interval(s) over which the function is increasing
Answer : (-∞,-1) U (-1, 1)
We need to find the interval(s) over which the function is increasing
We look at the intervals of x where the graph is increasing
Increasing interval of the graph is the part where the graph goes up.
At first the graph starts increasing and it increases till x=-1
So the first increasing interval is -infinity to -1 . We write it as (-∞,1)
Now, we look at the part where the graph changes direction
In the middle inverted U shaped graph , the graph starts increasing at x=-1 and increases till it changes direction. The graph is increasing till x=1
so second increasing interval is x=-1 to 1. we write it as (-1,1)
Now combine both intervals by a 'U' union
(-∞,-1) U (-1, 1)
The interval(s) over which the function that is increasing is (-∞,-1) U (-1, 1)
What is the intervalFrom the question, One need to find the interval(s) over which the function is increasing
Since intervals of x where the graph is increasing Increasing interval of the graph is the part where the graph goes up.
At first the graph starts increasing and it increases till x=-1, So the first increasing interval is -infinity to -1 . We write it as (-∞,1). So, one look at the part where the graph changes direction
In the middle inverted U shaped graph , the graph starts increasing at x=-1 and increases till it changes direction. The graph is increasing till x=1
Since the increasing interval is x=-1 to 1. one then need to write it as (-1,1)
So, The function is increasing for all values of x in the open interval from negative infinity to negative 1, excluding -1, and also in the open interval from -1 to 1, excluding both -1 and 1."
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