From the statement of Hess law, the ΔH3 is calculated when others are known from; ΔH3 = ΔH4 -( ΔH1 + ΔH2).
What is Hess law?Hess law of constant heat summation states that the total heat evolved or absorbed for a series of reactions is the sum of all the heat absorbed or evolved at all steps in the reaction sequence.
Let the heat for the overall reaction be ΔH4 while ΔH1, ΔH2 and ΔH3 designate the heat of reaction for reactions 1,2,3. It then follows that, the ΔH3 is calculated when others are known from; ΔH3 = ΔH4 -( ΔH1 + ΔH2).
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Please help! I have more questions like this!
Answer:
2-2i√3=4(1/2-√3/2i)=4e^j(5π/3)
4^4=256
e^4j(5π/3)=e^j(20π/3)=e^j(2π/3)
polar form: 256 cis (2π/3)
rectangular form: −128+128i√3
hope this helped, if you still need help lmk
Anyone know how to do??
Answer:
x = 1
Step-by-step explanation:
...................
Answer:
1
Step-by-step explanation:
Step 1:
3x + 11 = 5x + 9 Sum of a line
Step 2:
11 = 2x + 9 Subtract 3x on both sides
Step 3:
2 = 2x Subtract 9 on both sides
Answer:
x = 1 Divide
Hope This Helps :)
Polygon ABCDE is reflected across the line x = −2. Graph and label the image A’B’C’D’E’. Is m∠A = m∠A’? Explain. Construct the line of reflection and then construct the image. Select a point to add a label.
Answer: See graph and proof below
Step-by-step explanation:
Under the reflection about the line x=-2
[tex]\begin{aligned}&A(-4,4) \longrightarrow A^{\prime}(0,4) \\&B(-3,3) \longrightarrow B^{\prime}(-1,3) \\&C(-3,2) \longrightarrow C^{\prime}(-1,2) \\&D(-5,1) \longrightarrow D^{\prime}(1,1) \\&E(-5,3) \longrightarrow E^{\prime}(1,3) \\&m < A=m < A^{\prime} \text { is true. }\end{aligned}[/tex]
Find the value of X
/)/)/))/):):
Answer: 16
Step-by-step explanation:
What is the value of x?
3 equal angles
so the triangle is equilateral => 3 equal sides
4x-10 = 3x+2
x = 12
or
4x-10 = 5x-22
-x = -12
x = 12
or
5x - 22 = 3x + 2
2x = 24
x = 12
x = 12
Answer:
The value of x = 12
Step-by-step explanation:
This is an equilateral triangle and the sides of an equilateral triangle are equal .
By putting the two sides of the triangle equal , we can find out the value of x
=> 4x - 10 = 3x +2
=> 4x - 3x = 2 + 10
=> x = 12
A farm has a small water tank with a diameter of 10 feet and a height of 4 feet. What is
the lateral surface area of the water tank?
40 square feet
125.6 square feet
solve for all real numbers of x. x^2+4=0
Answer:
x = -2i, 2i
Step-by-step explanation:
x² + 4 = 0
-4 -4
x² = -4
x = 2i, -2i
I hope this helps!
help me pls pls pls pls pls pls pls
In the top row, first column the answer is D) Ray RQ and Ray RS. Opposite rays point in complete opposite directions. When joined, opposite rays form a line.
-----------
In the top row, second column, the answer is B) S, T, U. We're naming three points that all fall on the same line.
===============================================
In the bottom row, first column, the answer is A) Point. An example of this is the diagram in the bottom right corner. The lines WV and XZ intersect at the point Y.
-----------
Finally, in the bottom row, second column, the answer is D) Ray YW and Ray YV. Like with the first problem, we're listing two rays that when joined, form a straight line. They point in complete opposite directions. The order matters when it comes to naming a ray. The first letter tells us the endpoint and the second letter tells us where the ray points and goes on forever.
Describe the shape of the data set (symmetrical, skewed, etc.) (statistic)
Answer:
Skewed left
Step-by-step explanation:
The outlier extends the curve making it skewed left is what i think
Colleen compared the ratios 3:8 and One-half. Her work is shown below. Write the ratios as fractions: Three-eighths and One-half The common denominator is 8. Write each fraction using the common denominator: Three-eighths and One-eighth Compare the numerators: 3 > 1 Write the correct statement: Three-eighths > One-half Where did Colleen make her first mistake?
This question is Incomplete
Complete Question
Colleen compared the ratios 3:8 and 1/2.
Her work is shown below.
Write the ratios as fractions: 3/8 and 1/8 Compare the numerators: 3 > 1 Write the correct statement: 3/8 > 1/2
Where did Colleen make her first mistake?
A. The common denominator should be 4 rather than 8
B. The numerators are compared incorrectly.
C. The fraction 1/2 should have been rewritten as 6/8
D. The fraction 1/2 should have been rewritten as 4/8.
Answer:
D. The fraction 1/2 should have been rewritten as 4/8.
Step-by-step explanation:
Colleen compared the ratios 3:8 and 1/2.
Step 1
Write the ratios as fractions: 3/8 and 1/2
Step 2
Compare the numerators: 3 > 1
Step 3
Compare the denominators 8 >2
Write the correct statement:
3/8 > 4/8
Therefore, D. The fraction 1/2 should have been rewritten as 4/8.
What is the answer for 2y=6
Answer:
y = 3
Step-by-step explanation:
Divide each side by 2 to cancel out the 2 next to y. It should now look like this: y = 3I hope this helps!
Answer:
y = 3
Step-by-step explanation:
6/2 equals 3, and since 2 times 3 equals 6, y is the answer for this problem.
Graph the pair of lines and use their slopes to determine if they are parallel, perpendicular, or neither.
Well they have to be perpendicual because they cross and parallel means that they are like lines on lines paper, they do not cross, they just keep going. Hope this helps :)
You are given a triangle that has sides 5 7 ad 10 how large is the smallest angle of the triangle
Answer:
Step-by-step explanation:
Comment
This uses the cosine Law for line length.
Formula
a^2 = b^2 + c^2 - 2*b*c*sin(A)
Givens
a = 5
b = 7
c = 10
Solution
5^2 = 7^2 + 10^2 - 2*7*10*cos(A)
25 = 49 + 100 - 140*cos(A) Combine the right side
25 = 149 - 140 * cos(A) Subtract 149 from both sides
25 - 149 = - 140*cos(A)
-124 = -140 * cos(A) Divide both sides by -140
-124/-140 = cos(A)
Cos(A) = 0.8857 Take the inverse Cos of both sides
A = cos-1(0.8857)
Answer
A = 27.66 degrees
how many cherries pies to 60 to 89 cherries 90 to 119 cherries?
Answer:
6
Step-by-step explanation:
i tried 7 and it didn't work
so i used a hint - it's 6!
6 pies are more in 60 to 89 cherries than 90 to 119 cherries, a bar graph is a graphical depiction of information, amounts, or numbers using bars or strips.
What is the bar graph?They are employed to contrast and compare various data kinds, frequencies, or other measurements of several categories of data.
here, we have,
The calculation of the bar graph in the given question.
For 60 - 89 cherries there are 10 pies
For 90 -119 cherries there are 4 pies
10 -4 = 6 pies
The image for the graph is attached below.
When displaying sections of data, bar charts should be used. As long as there aren't too many categories to compare, vertical bar charts can be useful for comparing several categories or discrete data, such as age groups, classes, schools, etc. They are quite helpful for time series data as well.
Therefore, there are 6 more pies in the 60 -89 cherries category than in the 90-119 category.
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The product of three different whole numbers is 40. What is the largest possible sum of the 3 numbers
Answer:
23
Step-by-step explanation:
20*2*1=40
20+2+1=23
Select all the correct answers.
martha works at a small jewelry store. she designs 2 rings in the first hour. every additional hour, she designs 3 new rings.
select all the functions that can be used to find the number of rings, r(n), she designs in n hours.
Answer:
26
Step-by-step explanation:
If n means 9 then 26 is the correct answer because 9hr. - 1hr. = 8hr. x 3 = 24 rings + 2 rings = 26.
HELPP 10 POINTS Here's a graph of a linear function. Write the equation that describes that function.
Answer:
y = (3/2)x+1
Step-by-step explanation:
Slope intercept form is y=mx+b where m represents the slope and b represents the y-intercept. As we can see on this graph, the line intersects the y axis at (0,1). Therefore, the y-intercept is 1. Now, we can choose another point to find the slope. I'll choose (2,4). To reach (2,4) from the y-intercept, we have to go up 3 units and right 2 units. Therefore, the slope is 3/2.
Our equation of the line is: y = (3/2)x+1
Write the equation that describes that function.
Answer:
y = (3/2)x+1
Can someone help me with this?
it's C since it also has 4 elements
makayla has 90 minutes to answer 36 questions on a school survey. how many mins per question does she have
Answer:
2.5 minutes per question
Step-by-step explanation:
90 mins/ 36 questions equals 2.5 mins per question
What value for a would make the equation true? Type in only the numerical answer or value.
Answer:
a = 3
Step-by-step explanation:
Here you can use the cross multiplication strategy or whatever it's called. That's where you multiply the diagonals together. Its kinda long to explain, but you can google it for details.
In either case, you get the following equation:
8(2a-1) = 4(a+7)
Open the parenthesis
16a - 8 = 4a + 28
Subtract 4a from both sides
12a - 8 = 28
Add 8 to both sides
12a = 36
Divide both sides by 12
a = 3
Sorry for weird formatting I'm on an ipad.
Answer:
Your answer is: A = 3
Solve for a by cross multiplying.
Step-by-step explanation:
Hope this helped : )
Four climbers climb four different mountains , climber 1 climbed 1 14/ 25 miles, climber 2 climbed 1.55 miles, climber 3 climbed 33/20 miles , and climber 4 climbed 24/15. What is the range of the heights?
Step-by-step explanation:
✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️
The price of broccoli is $1.25 per pound. Let y be the total cost in dollars of buying x pound of broccoli. Which equation represents the situtation?
Answer: y=1.25x
Step-by-step explanation:
i got it right
Answer: y=1.25x, which equation represents the situtation.
What is equation?An equation is a mathematical statement that is made up of two expressions connected by an equal sign.
Here, given that,
The price of broccoli is $1.25 per pound.
Let, y be the total cost in dollars of buying x pound of broccoli.
Hence, equation represents the situtation is y=1.25x.
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The distance around a triangle is 30 centimeters. if two sides are equal and the length of the third side is 8 centimeters, what is the length of each of the other two sides?
Answer: 11 cm
Step-by-step explanation:
Solve the system by substitution.
{-2.5x+y=13.5
12.25x - y=-12.25
(-5.1)
(-1,5)
(1.-5)
(5.-1)
Answer:
(-5,1)
Step-by-step explanation:
y= 13.5+2.5x
-13.5 -13.5
-13.5= 2.5x
x= -5.4
The line passing through which two ordered pairs would be perpendicular to the equation y = 4x - 1?
(-4, 7) and (-1, -5)
(4, 2) and (8, 1)
(1, -3) and (2, 1)
(-8, -4) and (0, -2)
Answer:
i'm pretty sure it is (1,-3) and (2,1)
What is the slope of a line perpendicular to the line whose equation is 4x – y = 9
Answer:
- [tex]\frac{1}{4}[/tex]
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Given
4x - y = 9 ( subtract 4x from both sides )
- y = - 4x + 9 ( multiply through by - 1 )
y = 4x - 9 ← in slope- intercept form
with slope m = 4
Given a line with slope m then the slope of a line perpendicular to it is
[tex]m_{perpendicular}[/tex] = - [tex]\frac{1}{m}[/tex] = - [tex]\frac{1}{4}[/tex]
Determine the value of x in each diagram
answer is 45 ( x = 45 ) yes or no
The diagram shows a regular octagon. Dennis drew diagonals from vertex A to all other non adjacent vertices. what is the measure of HAF?
Answer:
A 45degrees
Step-by-step explanation:
15 equals 1/3 x x = please please help
Answer:
x = 45
Step-by-step explanation:
15 = [tex]\frac{1}{3}[/tex] x ( multiply both sides by 3 to clear the fraction )
45 = x
Answer:
x = 45
Step-by-step explanation:
15 = x
15(3)=x
45=x or x=45
find value of x, giving reasons
Answer:
=> x = 2.4
Step-by-step explanation:
By using PGT
=> (5+x)² = 7²+x²
=> 5² +x² +2(5)(x) = 49+x²
=> 25 + x² + 10x = 49 +x²
=> 10x = 49-25
=> 10x = 24
=> x = 24/10
=> x = 2.4