Answer:
Step-by-step explanation:
The answer to this question is 3
Hope this helps
To balance the chemical equation N2 + __H2 -> 2NH3, we need to have the same number of each type of atom on both sides. We have 2 Nitrogen atoms on each side of the equation, but the Hydrogen atoms are unbalanced. By placing a coefficient of 3 before H2, we get a balanced chemical equation; N2 + 3H2 -> 2NH3. Hence, the correct answer is option B, 3.
Explanation:In order to balance a chemical equation, the same number of each type of atom must be present on both sides of the equation. In the initial chemical equation given, N2 + __H2 -> 2NH3, we have 2 Nitrogen atoms on both sides which is balanced. However, for Hydrogen we have 2 Hydrogen atoms on the left side (from H2) but 6 on the right side (as each NH3 molecule has 3 Hydrogen atoms). Therefore, we need to balance the Hydrogen atoms.
Putting a coefficient of 3 before H2 on the left side of the equation, we will have 3 * 2 = 6 Hydrogen atoms. This balances the Hydrogen atoms on both sides of the equation. Hence, the balanced chemical equation becomes N2 + 3H2 -> 2NH3. Therefore, the correct answer is B. 3.
Learn more about Balancing Chemical Equations here:https://brainly.com/question/28294176
#SPJ3
I need the answer ASAP
Answer: He would have 20
Step-by-step explanation:
well first you do 15/3=5 which means it was 5 per week =. Then, you multiply 4 x 5=20 to know how much he had over 4 weeks.
PLZ MARK ME AS BRAINIEST !!!!!!!
What Multiplies to get 540, but adds to get -16?
Polynomial help! Show your work! There is no multiple choice. I know how to solve the problem just can’t figure this one step
what is the value of the exponential expression below?
16^1/2 is the same thing as 2√16.
Simply multiply the result of √16 by 2 to get the answer.
√16 = 4
4 * 2 = 8
The correct answer is 8.What is the slope of the line
Answer:
The slope is 7/4.
Given the equation: y−6=1/2(x+2) in point slope form, rewrite the equation into standard form. Show your work for full credit.
Answer:
x - 2y = - 14
Step-by-step explanation:
the equation of a line in standard form is
Ax + By = C ( A is a positive integer and B, C are integers )
given y - 6 = [tex]\frac{1}{2}[/tex](x + 2)
multiply all terms by 2 to eliminate the fraction
2y - 12 = x + 2 ( subtract 2 from both sides )
2y - 14 = x ( subtract 2y from both sides )
- 14 = x - 2y, hence
x - 2y = - 14 ← in standard form
Plis help me with this .
Draw graph of function.
f(x)=-2x+2
The sale price of an item is 0.75 the original price of the item, x. Which statement explains why both 3 4 x and 0.75x can find the sale price of the item? The fraction 3 4 is the same as the decimal 0.25. Therefore, 3 4 x can be written as 0.25x. Multiplying by 4 3 is the same as multiplying by 0.8. The expressions are not equivalent. Multiplying by 3 4 is the same as multiplying by 75%.
Answer:
Answer. Multiplying by 3/4 is the same as multiplying by 75%.
Step-by-step explanation:
Last option: Multiplying by 3/4 is the same as multiplying by 75%, because:
3/4=0.75 and
75%=75/100=0.75
then 3/4=0.75=75%
-3 = t/-15. solve for t.
Answer:
t=45
Step-by-step explanation:
-3=t/-15 step one multiply both sides by denominator
-3 x -15 = 45
Answer:t=45
Step-by-step explanation:
its hard to explain because i do it in my head
Solve this for me please??
Answer: 4 cups of milk
=============================
Work Shown:
2 & 1/2 = 2 + 1/2 = 2+0.5 = 2.5
2.5 cups of milk makes 5 servings
x cups of milk makes 8 servings
Divide the cups of milk over the servings to get this proportion
2.5/5 = x/8
Cross multiply and solve for x
2.5/5 = x/8
2.5*8 = 5*x
20 = 5*x
5*x = 20
x = 20/5
x = 4
You need 4 cups of milk to make 8 servings
wat is 78×748 plz help i cant be on mah phone someone answer quick plz
Answer:
the answer is 58344
Step-by-step explanation:
Rons class donated d dollars to a local charity Danny’s class donated 21% more than Ron’s class witch expression shows the amount Danny’s class donated in terms of the amount donated by Ron’s class
Answer:
1.21d
Step-by-step explanation:
21% more = times 1.21
so Ron's class donated 1.21 times danny's class, therefore the expression for the amount ron's class donated in terms of danny's class is 1.21 d
List the following numbers in order from least to greatest. 2.31,2.13,0.123,3.12
Answer:
Step-by-step explanation:
0.123
2.13
2.31
3.12
That is least to greatest. I hope I answered your ?. Can you help me?
Answer:
0.123, 2.13, 2.31, 3.12
Step-by-step explanation:
look at first number and put those in order.
with both numbers that start with 2, look at the next number and put the lowest one first
a clothing store offers a free t-shirt when a customer spends $75 a month lyndon and has already spent $36.95 which statement best represents all of the amounts he can spend to get a free t-shirt
A.$34.05 or more
B.$34.05 or less
C.$38.05 or more
D.$38.05 or less
You downloaded a video game to your computer. You have a 60-minute free trial of the game. It takes 5 minutes to set up the game and 7 minutes to play each level. You want to find out how many levels you can play for free.
Let l represent the number of levels played. Write an inequality to determine the number of levels you can play in 60 minutes.
Answer:
I think the equation is 7l +5=60
Step-by-step explanation:
A specific distance is approximately 63,500,00 mi. A fly is about 0.18 in. long ???
A) what is the distance written in scientific notation
B) what is the length of a fly written in scientific notation
C) change the distance to inches it would be 5.04×10 to the power of nine if we lined up the flies how many would it take to reach the distance in standard form and scientific notation.
Answer:
Step-by-step explanation:
a) Given that a specific distance is approximately 6350000 miles.
To write this in scientific notation. We know that for writing in scientific notation we must writte the given number as a positive number less than 10 x product of powers of n.
Hence this number
6350000 = 6.35 x1000000 = [tex]6.35x10^6[/tex] miles
b) Length of a fly = 0.18 inches.
To write this in scientific notation. We know that for writing in scientific notation we must writte the given number as a positive number less than 10 x product of powers of n.
so 0.18 = 1.8([tex]1.8(10^{-1}[/tex]
c) Given that distance = 5.04x10^9 inches
To line up number of flies required
= [tex]\frac{5.04x10^9}{0.18} = \frac{504x10^9}{18}=28(10^9)\\Answer is\\28(10^9)[/tex]
In this mathematical problem, the distance of 63,500,000 miles is written in scientific notation as 6.35 x 10^7. The length of a fly, 0.18 inches, is expressed in scientific notation as 1.8 x 10^-1. To find the number of flies to cover the distance, the distance is first converted to inches (5.04 x 10^9), which when divided by the length of a fly results in 2.8 x 10^10, meaning approximately 28,000,000,000 flies would be needed.
Explanation:The student's question involves the use of scientific notation and unit conversion in Mathematics.
Firstly, the distance given as approximately 63,500,000 miles can be written in scientific notation as 6.35 x 10^7 miles. The number is changed to a number between 1 and 10 by moving the decimal point 7 places to the left, hence the exponent 7. Secondly, the length of the fly given as 0.18 inches can be written in scientific notation as 1.8 x 10^-1 inches. The decimal point is moved 1 place to the right resulting in an exponent of -1. Lastly, to find out how many flies it would take to reach the distance, we first need to convert the distance from miles to inches. It is given that the conversion is approximately 5.04 x 10^9 inches. So, if we divide this by the length of a fly, i.e., 1.8 x 10^-1 inches, we would arrive at approximately 2.8 x 10^10 flies in both standard form and scientific notation. That is, it would take about 28,000,000,000 flies to reach the mentioned distance. Learn more about Scientific Notation and Unit Conversion here:
https://brainly.com/question/14694084
#SPJ12
What true about centimeters and kilometers
Answer:
Centimeters and kilometers are used to measure length
Step-by-step explanation:
Centimeters and kilometers are related to each other.
We can represents centimeters in kilometers and kilometers in centimeters
Short form
The short form of kilometers = km
The short form of centimeters = cm
1 km = 100000 cm
1 cm = 1/100000 km
We can also represent both in terms of meters
1 m = = 100 cm
1000 m = 1 km
A sandwich store charges a delivery fee to bring lunch to an office building. One office pays $33 for 4 turkey sandwiches. Another office pays $61 for 8 turkey sandwiches. How much does each turkey sandwich add to the cost of the delivery fee? Explain using equations and graph. Are they able to get 12 sandwiches for $85?
Answer:
No each sandwich costs about 8.25, when multiplied it goes to $99 which is 14 dollars too much
Step-by-step explanation:
A leprechaun places a magic penny under a girl's pillow. The next night there are 2 magic pennies under her pillow. Each night the number of magic pennies doubles. How much money will the girl have after 22 nights?
Answer:
tn = 2097152 penniestn = 20971.52 dollars.Step-by-step explanation:
A surprisingly large amount of money.
The question is "Does the amount of money just double or do the previous amounts add to the present amount?"
I think it just doubles. Not only that, but she can't spend any of it until night 22 is reached.
tn = a*2^(n - 1)a = 1 She starts with 1 penny.n = 22tn = 1*2^(22 - 1)tn = 1*2^21tn = 2097152 penniestn = 20971.52 dollars.Given: ABCD is a rectangle. If AC = 10, then BD = 5 8 10
Answer:
[tex]BD=10[/tex]
Step-by-step explanation:
We are given rectangle ABCD
Firstly, we will draw a rectangle
we can see that
AC and BD are diagonals of rectangle
and we know that
Diagonals of any rectangle are always equal
so,
[tex]AC=BD[/tex]
we are given
AC=10
we can plug it
and we get
[tex]10=BD[/tex]
so,
[tex]BD=10[/tex]
20. What should be the top item on a list of your life goals?
A. A goal that's most important to you
B. A goal that's easily achievable
C. A goal you think others would want you to complete
D. A goal that's financially feasible
Answer:
The most appropriate answer option is A. A goal that's most important to you .
Step-by-step explanation:
The top item on a list of your life goals should be a goal that's most important to you.
One should not give a thought about what others want or expect from you but what you want for yourself and you think is the most important to you.
No matter how difficult or even impossible it may seem to you, you should always stay focused on it and never give up on it. With dedication and consistency, you will be able to manage and ultimately achieve it.
The product of these slopes is ______.This product shows that the slopes are negative reciprocals. It is given that the lines are perpendicular and we have shown that the slopes of the lines are negative reciprocals.
Answer:
- 1
Step-by-step explanation:
Let the slope of one line be 's' , then according to the given condition that the slope of second line is negative reciprocal of the first , We obtain the slope of the second line as [tex]\frac{-1}{s}[/tex].
So, the product of both the slopes is given by [tex]s\cdot \frac{-1}{s}=-1[/tex]
This shows that whatever the slopes may be if they are negative reciprocal of each other then their product will always be -1
Answer:
it should be a, im pretty sure but not completely
Step-by-step explanation:
What is the equation of a line with a slope of 7 and a point (1, 8) on the line?
Express the equation in the form of y = mx + b, where m is the slope and b is the y-intercept.
Enter your answer in the box.
Answer:
y = 7x + 1
Step-by-step explanation:
If the slope and coordinates have already been given, you can plug the values into the following equation of a line:
y - y1 = m(x - x1)
Where y1 is the y coordinate, so in this case 8,
x1 is the x coordinate which is 1
m is the slope, so 7:
y - 8 = 7(x - 1)
Expand the brackets:
y - 8 = 7x - 7
To isolate the y, we need to move the -8 over to the other side making it a positive 8:
y = 7x - 7 + 8
y = 7x + 1
So the equation of the line is y = 7x + 1
What is the probability that someone in the survey considered reading books or surf the internet as the best entertainment?
Answer:
31/100
Step-by-step explanation:
From the given table
Reading books percentage is 22
so Probability (reading books) = [tex]\frac{22}{100}[/tex]
Surf the internet percentage is 9
Probability (surf the internet) =[tex]\frac{9}{100}[/tex]
the probability (reading books or surf the internet)= P(reading books) + P(surf the internet)
probability (reading or surf)= [tex]\frac{22}{100} +\frac{9}{100}[/tex]
= [tex]\frac{31}{100} [/tex]
Answer:
Answer is [tex]\frac{31}{100}[/tex]
Step-by-step explanation:
values given in table
Reading books percentage is 22
hence we can write probability as
Probability (reading books) = [tex]\frac{22}{100}[/tex]
percentage of surfing internet is= 9
Probability of surfing internet is =[tex]\frac{09}{100}[/tex]
the probability (reading books or surf the internet)= P(reading books) + P(surf the internet)
probability (reading or surf)= [tex]\frac{22}{100}[/tex]+[tex]\frac{09}{100}[/tex]
=[tex]\frac{31}{100}[/tex]
PLEASE HELP!!
Given: line segment AB is 10 inches long.
Find the length of A'B' if AB is dilated to form A'B' with a scale factor of 2.
A) 1/2 inches
B) 5 inches
C)10 inches
D)20 inches
Answer:
D or 20
Step-by-step explanation:
If the scale factor is 2 then you take the original number, 10, and multiply it by 2.
10*2=20
Answer:
Option D). 20 inches
Step-by-step explanation:
Length of AB which is of length = 10 inches.
If the length of AB is dilated to form A'B' with a scale factor of 2, then we have to find the length of A'B'
Since we know the formula of dilation as
New dimension = Scale factor × Old dimension
So A'B' = Scale factor × AB
A'B' = 2× 10 = 20 Inches
Option D). 20 inches is the solution.
2x + 5y = 17 and 6x - 5y = -9 what is the solution of the system use elimination
x = 8.5 + 2.5y answer one can’t figure out answer two. Sorry
Answer:
{x = 1 , y = 3
Step-by-step explanation:
Solve the following system: using elimination:
{2 x + 5 y = 17 | (equation 1)
{6 x - 5 y = -9 | (equation 2)
Swap equation 1 with equation 2:
{6 x - 5 y = -9 | (equation 1)
{2 x + 5 y = 17 | (equation 2)
Subtract 1/3 × (equation 1) from equation 2:
{6 x - 5 y = -9 | (equation 1)
{0 x+(20 y)/3 = 20 | (equation 2)
Multiply equation 2 by 3/20:
{6 x - 5 y = -9 | (equation 1)
{0 x+y = 3 | (equation 2)
Add 5 × (equation 2) to equation 1:
{6 x+0 y = 6 | (equation 1)
{0 x+y = 3 | (equation 2)
Divide equation 1 by 6:
{x+0 y = 1 | (equation 1)
{0 x+y = 3 | (equation 2)
Collect results:
Answer: {x = 1 , y = 3
1.74÷(−0.06)?
PLEASE HELP ME
1.74/-0.06 is -29.
You can use your calculator next time. Its easier than using points.
yogi ran 1/5 of a mile in 2/3 of an hour. how far will he run in one hour
Mr. Sprocket borrows $3,500 from his bank to buy a used car. The loan has a 7.4% annual simple interest rate. If it takes Mr. Sprocket two years to pay back the loan, what is the total amount he will be paying?
Answer:
the correct answer is $4018
Lee can type 1 1/3 pages every 15 minutes. How many hours does it take him to type 10 2/3 pages
Answer:
2 hours
Step-by-step explanation:
if you can type 1 1/3 pages every 15 minutes than you can type 5 1/3 pages every hour. you divide 10 2/3 pages by how many pages Lee can type every hour and the result is 2 hours
Factor the expression P^4+3p^3-10p^2
Answer:
[tex]p^2(p+5)(p-2)[/tex]
Step-by-step explanation:
To begin factoring the expression [tex]p^4+3p^3-10p^2[/tex], we use the GCF or greatest common factor. The greatest common factor is the greatest number that will divide into two or more values. We start to find it by factoring each term:
[tex]p^4=p*p*p*p[/tex]
[tex]3p^3: 3*p*p*p[/tex]
[tex]-10p^2: -10*p*p[/tex]
Remember -10 can factor into smaller numbers but since it doesn't have common factors with the others, we've chosen to leave it as -10.
We notice the only common factors bare p*p or [tex]p^2[/tex].
We write in the form p^2(____+_____+_____). We find the inside of the parenthesis by dividing each term by p^2.
[tex]\frac{p^4}{p^2} =p^2[/tex]
[tex]\frac{3p^3}{p^2} =3p[/tex]
[tex]\frac{-10p^2}{p^2}=-10[/tex]
[tex]p^2(p^2+3p-10)[/tex].
We are not finished yet. We have a trinomial (3 terms) which also factors. We factor by splitting the middle term 3p into factors of -10 which add to 3.
--10 = 5 * -2
3p= 5p +-2p
We write [tex]p^2(p+5)(p-2)[/tex].