Does anyone have the answer key to these proofs? They are Mrs. E Teaches Math introductory proofs. There are 14 total. I've done 1-9.
Answers
Statement 1: 2AB = AC
Reason 1: Given
--------------------------------------------
Statement 2: AC = AB+BC
Reason 2: Segment addition postulate (which your teacher abbreviated to "Seg + Post")
--------------------------------------------
Statement 3: 2AB = AB+BC
Reason 3: Substitution
--------------------------------------------
Statement 4: 2AB-AB = AB+BC-AB
Reason 4: Subtraction Property of Equality
---------------------------------------------
Statement 5: AB = BC
Reason 5: Combine like terms
----------------------------------------------
Notes:
The first reason is "given" since we just simply restate what the instructions provide. If you are given multiple items, you list each one at a time. The segment addition postulate is where we break a line into smaller parts and then build it back together.Substitution is simply replacement. We've replaced AC with 2AB.The subtraction property of equality is the idea where we subtract the same thing from both sides. In statement 4, we're subtracting AB from both sides.The last statement of any proof is always the thing we're trying to prove. Once we reach such a statement, there's no need to go any further since the proof has concluded.Related Questions
Joshua tells his friends that for there to be snow it has to be 32o F. He uses his thermometer outside and sees snow. He finds it is only is 34oF. What is his percent error? (Round to the nearest tenth)
Answers
Answer: Percentage error = -5.9%
Step-by-step explanation:
Step 1
Percentage error =Approximate Value − theoretical Value / Theoretical value × 100%
or
Percentage error = Assumed number - Result number / Result number x 100
Given Assumed number / Approximate Value= 32o F
Result number/ Theoretical value= 34o F.
Step 2---
Percentage error = (32 - 34)/ 34 x 100
= - 2/34 x 100
= - 5.88%
Joshua was in error by - 5.88 % which when rounded to nearest tenth gives - 5.9%.
You decide to erect A statue of yourself in your homeroom class is 10.25 feet tall fire code forces you to leave 1.5 feet of space between your statue and the ceiling write equality showing the possible height of your statue
Answers
Solve using substitution.
x − 4y = –14
3x + 8y = 18
ordered pair=?help
Answers
Answer:
(-2,3) if your doing substitution
(-2,3) for Elimination
Step-by-step explanation:
At Pizza pizzazz the cost of a square pizza depends on the total square inches. A small
Pizza is 5 inches on each side and cost four dollars plus $0.05 per square inch. A medium pizza is 8 inches on each side and cost $3.50 plus $0.04 per square inch. What is the difference in price between a small pizza and a medium pizza?
Answers
Answer:
The difference in price between a small pizza and a medium pizza is $0.81
Step-by-step explanation:
Small pizza
Side = 5inch
Area = 25 sq.in
Cost = $4 +0.04*25
= 4 + 1.25 = $5.25
Medium pizza
Side = 8inche
Area = 64 sq.in
Cost = 3.50 + 0.04*64 = $6.06
Difference = Medium pizza - small pizza
= 6.06 - 5.25
= $0.81
Find the slope of the line that is parallel to the line y = 2x + 5
Also if any of u know how to get the live tutor option could u please tell me I can’t find it lol
Answers
Answer:
2
Step-by-step explanation:
parallel lines have same slope.
y = 2x + 5
y = mx + b
m is the slope
b is y-intercept
isolate the variable on the following problem. show your work.
3a+3=6
Answers
Answer:
3a=6-3
Step-by-step explanation:
if you have the equation 3a + 3 = 6, you have to move 3 to the other side of the equation to isolate it. To do this, you subtract 3 from both sides giving you 3a=6-3
Hope this helped
Please help what is the slope of the line through each pair of points
(-4,-7), (19,11)
Answers
Answer:
3/4
Step-by-step explanation:
m=y2-y1/x2-x1
11-(-7)=18
19-(-4)=23
18/23
18/23 in simplest form is 3/4
hope this helps :3
if it did pls mark brainliest
Answer:18/23
Step-by-step explanation:
m=y1-y2/x1-x2+b
Solve the following equation for y. Hint: Get y alone on one side of the equation.
4x + 2y = 4
A.
y = -2x + 2
B.
y = -4x - 4
C.
y = 2x + 2
D.
y = x - 1
Answers
Answer:
y = 2 - 2x
Step-by-step explanation:
Answer:
A. y = -2x + 2
Step-by-step explanation:
4x + 2y = 4
Move 4x to the other side of the equation.
2y = 4 - 4x
Divide the whole thing by 2 to get y by itself.
y = 2 - 2x
which can also be written as
y = -2x + 2
Hope this helps! :)
Find the slope of the following graph and Identify the type of
Slope:
Answers
Answer:
the slope is undefined
Step-by-step explanation:
in the slope equation rise/run you can't divide by 0
What system of inequalities is shown in the graph?
A. x 2x + 3
B. x 3x + 2
C. x ≤ −1 and y ≤ −0.4x + 2
D. x ≤ −1 and y ≤ −2x + 2
Answers
which table represents a nonlinear function? Help please!
Answers
Let x be a multiple of 3
If the sum of three consecutive multiples of 3 is 99, write down without simplifying an equation in terms of x.
Answers
Answer:
y=mx+b
Step-by-step explanation:
Can U solve this?!
No Improper answers!
Answers
Answer: The answer is 1.
Step-by-step explanation: 5 attached images to this equation for step by step.
What is the percent of change from 5 to 9?
Answers
Hey there! It would be 44% decrease...
Explanation:
So we know that 9 would be 100%. So what is the percent of change?
So let divide 5 with 9. 5 divide 9 would be 0.56.
Great, now we can subtract 100 with 0.56 since we know that 56% is 5. 100-56 is 44. This means that the percent decrease would be 44%.
Final Result: 44%
The percent change from 5 to 9 is 80%.
What is percentage?Percentage is a measurement to find the value of a given number out of hundred.
Given that,
The original number is 5.
The number changes to 9 .
Increase in number = 9-5 = 4
The percentage change = 4/5×100 = 400/5 = 80%
The percentage change is 80% from 5 to 9.
To learn more on Percentage:
https://brainly.com/question/24120406
#SPJ2
TWO MOVES TO FIT IN THE CLEAR SHAPE
Answers
Answer:
Answer:Move right twice
Andy wanted to make a poster of the photograph at the right with the
measurements by using a scale 1 to 100.
1) Find the measurements of the poster?
8.25 3.25
Answers
Answer:
2
Step-by-step explanation:
I WILL GIVE BRAINLIEST Simplify by combining like terms.
3x + 5 − x − 13
A. 3x + 18
B. 2x + 18
C. 2x − 8
D. 3x – 8
SHOW YOUR WORK PLZSSSSSSSSS
Answers
Answer:
C. 2x-8
Step-by-step explanation:
You combine like terms so you will combine 3x and the -x which makes 2x. you then combine the +5 and the -13 which results in -8. The end result is 2x-8
Answer:
C. 2x - 8
Step-by-step explanation:
Step 1: Group like terms
5-8=2
3x - x =2x
Step 2: Add similar elements
2x+5-13
Step 3: Add/Stubtrct the numbers
5 - 13=-8
Answer: 2x-8
3. Write an equation in point-slope form that describes the line with a slope of 2 that contains the point (4,-3)?
Answers
Answer:
y + 3 = 2 (x - 4)
Step-by-step explanation:
y - y₁ = m (x - x₁)
substitute (4, -3) in for (x₁, y₁)
y - (-3) = m (x - 4)
substitute the slope (2) in for m (m=slope) and simplify (y - (-3)) to (y +3) because subtracting a negative is the same as adding a positive
y + 3 = 2 (x - 4)
and that's your final answer! hope this helped :)
The graph shows the distances traveled by two cars over several hours.
Which car is moving at a faster rate?
Answers
Answer:
Car b
Step-by-step explanation:
It has gone a farther distance in a shorter amount of time.
Answer: car B
Step-by-step explanation: The graph shows two sides time and distance you can see car B is further on the graph by time and distance car A traveled a shorter distance.
What is the solution to the equation?
2(x + 7)2/3 = 8
A. -15 and 1
B. -15
C. 1
D. no solution
Answers
Answer = -1
Answer:
-1 option D (no solution)
Step-by-step explanation:
2(x + 7)2/3 = 8
2(X+7)2/3=8
4(X+7)=24
4x+28=24
4x=24-28
4x=-4
X=-4/4
X=-1
So the answer is -1
There are 80 tickets in a bag and the ratio of winning tickets to losing tickets is 2 : 8. How many of each kind of ticket are in the bag?
Answers
Given:
Total number of tickets = 80
Ratio of winning tickets to losing tickets is 2 : 8.
To find:
The number of tickets of each kind in the bag.
Solution:
Let the number of winning and losing tickets are 2x and 8x respectively.
Total number of tickets = 80
[tex]2x+8x=80[/tex]
[tex]10x=80[/tex]
Divide both sides by 10.
[tex]x=\dfrac{80}{10}[/tex]
[tex]x=8[/tex]
Now,
Winning tickets : [tex]2(8)=16[/tex]
Losing tickets : [tex]8(8)=64[/tex]
Therefore, the winning and losing tickets are 16 and 64 respectively.
Solve the system of equations. y=-3x+4 -4x+y=-10
Answers
Answer:
Step-by-step explanation:
In this particular case we have the following system of equations:
y
=
−
3
x
+
4
[
E
q
.
1
]
x
+
4
y
=
−
6
[
E
q
.
2
]
Substituting
[
E
q
.
1
]
in
[
E
q
.
2
]
:
x
+
4
(
−
3
x
+
4
)
=
−
6
Applying the distributive property on the left side:
x
−
12
x
+
16
=
−
6
Simplifying
:
−
11
x
=
−
22
Solving for
y
:
x
=
−
22
−
11
=
2
Substituting
x
=
2
in
[
E
q
.
1
]
:
y
=
−
3
(
2
)
+
4
=
−
2
Therefore
, the solutions are
x
=
2
and
y
=
−
2
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[tex]y = - 3x + 4[/tex]
Add sides 3x
[tex]y + 3x = 3x - 3x + 4[/tex]
[tex]3x + y = 4[/tex]
_________________________________
[tex]1) \: 3x + y = 4[/tex]
[tex]2) \: - 4x + y = - 10[/tex]
Multiply sides of the (( equation 2 )) by - 1
[tex]1) \: 3x + y = 4[/tex]
[tex]2) \: 4x - y = 10[/tex]
Add up equations
[tex]3x + 4x + y - y = 4 + 10[/tex]
[tex]7x = 14[/tex]
Divide sides by 7
[tex] \frac{7x}{7} = \frac{14}{7} \\ [/tex]
[tex]x = 2[/tex]
Put the value of x in one of the (1) or (2) equations to find the value of y .
I put it in equation 1 :
[tex]3x + y = 4[/tex]
[tex]3(2) + y = 4[/tex]
[tex]6 + y = 4[/tex]
[tex]y + 6 = 4[/tex]
Subtract sides 6
[tex]y + 6 - 6 = 4 - 6[/tex]
[tex]y = - 2[/tex]
And we're done...
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
What is the amplitude of y = -8sin(3x)?
Answers
Answer:
for y=-8sin(3x)
Amplitude = 8
Answer:
8
Step-by-step explanation:
amplitude =8
|sin (3x)|≤1
so |-8 sin (3x)≤8
In triangle ABC, we can draw a perpendicular line segment from vertex C to segment AB. The intersection of AB and the perpendicular is called E. We know that BE is the shortest distance from B to and that is the shortest distance from A to CE because of the shortest distance theorem. Therefore, BC > BE and AC > AE. Next, add the inequalities: BC + AC > BE + AE. Then, BE + AE = BA because of the . Therefore, BC + AC > BA by substitution.
Answers
Answer:
CE..AE...Segment addition postulate
Step-by-step explanation:
i got these answers from the quiz
Answer:
1.A
2.C
3.A
Step-by-step explanation:
Edgen2020
A park contains 210 trees on 40 acres. What is rate of trees per acre at the park?
Answers
Answer:
the answer would be 210:40
Step-by-step explanation:
7(1 - x) = -3(x - 2)
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Answer:
the answer is x= 1/4 :D .....
Answer: bro its x=1 over 4
Step-by-step explanation:
Based on what you see here, what is the domain of this function?*
Your answer
This is a required question
Answers
Answer:
Domain seems to be all real numbers.
Step-by-step explanation:
Which relation is linear?(click all that apply)
Answers
Because it’s the answer
Please help me 15+ points for anyone who answers please answer
Answers
Answer:
d is your answer hope it helps
Answer:
D is the answer
Step-by-step explanation:
Trust
1. What is the volume of the cylinder below? Do not include the in
10 in.
30 in.