Please I need someone very smart to explain this open ended this is algebra 2
Answers
Answer:
No. The correct answer is x = 4i. The mistake is made on the penultimate step where "Mark" squares both sides, eliminating the negative sign.
Step-by-step explanation:
We can see that the answer is incorrect, because if we plug it back into the original equation, we get:
[tex]8 - \sqrt{x} = 10\\8 - \sqrt{4} = 10\\8 - 2 = 10\\6 = 10[/tex]
This of course is obviously incorrect. The mistake is made in squaring away the negative sign in solving the problem. An easier way to look at this is to get rid of √x, and substitute it for "n", and see what we get:
[tex]8 - n = 10\\-8 + n = -10\\n = -2[/tex]
If we swap √x back in, we get:
√x = -2
x = 4i
let's solve it correctly:
[tex]8 - \sqrt{x} = 10\\-\sqrt{x} = 10 - 8\\-\sqrt{x} = 2\\\sqrt{x} = -2\\x = 4i[/tex]
Related Questions
Turn away weight loss challenge your friend goes from one $125 lb to 100 lb what was the percent weight loss
Answers
Please help if you don’t mind
Answers
Answer:
41in^3
Step-by-step explanation:
Does anyone know how to solve this?
Answers
9514 1404 393
Answer:
Step-by-step explanation:
The tangent of the angle can be found using the identity for the tangent of the difference of angles.
tan(α-β) = (tan(α) -tan(β))/(1 +tan(α)tan(β))
The tangent of the angle of each vector is the ratio of the j coefficient to the i coefficient.
tan(α) = -2/3
tan(β) = 4/7
tan(α-β) = (-2/3 -4/7)/(1 +(-2/3)(4/7))
= (-14-12)/(21 -8) = -26/13 = -2
Then the magnitude of the angle between the vectors is ...
arctan(2) ≈ 63.43°
Mrs. Palma took her coworkers out to dinner yesterday and their subtotal was
$
72.39
.
If the sales tax is
5
%
and she plans to leave a
20
%
gratuity after the tax it is added, how much will Mrs. Palma spend total on dinner?
Answers
Answer:
90.49
Step-by-step explanation:
the answer is 90.49, hope this helps!
SOMEONE PLEASE HELP ME WITH THIS PLEASE PLEASE PLEASEE ILL GIVE BRAINLY IF YOU GET IT RIGHT!!!!!!!
Answers
The others are all in common in that they are greater than .5
D is the only one that is unique in that it is a lower number.
I know this probably doesn’t help explain but I hope you get it right
Hi, I am not that sure about this question but I believe that the answer is D. Have a great day and enjoy the summer.
1. The more seats an airline can put in an airplane, the more money it will make. However, if seats are too narrow, passengers will be angry and uncomfortable. An airline might first consider the average woman's hip breadth when designing seats. Why would the airline use women instead of men when determining the maximum width of an airline seat?
Answers
Answer:
Airlines would use women instead of men because women usually have wider hips compared to the average men. So if they give enough room for the average women, then there will be enough room for the average man.
Step-by-step explanation:
4y + 12 = 8
y=
Someone please help!!
Answers
4y = -12 + 8
4y = -4
y = -4/4
y = -1
????????????????????—————-
Answers
Answer:
Step-by-step explanation:
Factor by grouping
3x^2 + 11 - 14
plss i need help!
Answers
Answer:
3x^{2}+11-14 hi
Step-by-step explanation:
Answer:
3(x²-1)
Step-by-step explanation:
=3x²-3
=3(x²-1)
Select all of the following side lengths that DO create a triangle. A. 5,6,8 B. 3,5,6 C. 4,3,8 D. 5,5,9 E. 3.7,5.3,9
Answers
A. 5,6,8
B 3,5,6
D 5,5,9
Grade 10 math help please show work
Answers
Answer:
∅ = 1.91°
Step-by-step explanation:
sin ∅ = 10/300 = 0.0333
∅ = 1.91°
( calculate angels using line and angle relationships). Will give b for right answer
Answers
Step-by-step explanation:
Since w||v
<a=140 ( Vertically opposite angles and corresponding angles)
Answer:
141 degrees
Step-by-step explanation:
if the lines are the same, so are all of the measures if the angles.
Eriasia wanted to put down new tile in her bathroom. Her bathroom had a width of 10 ft and a width of 9 feet. How many square feet of tile should she buy
Answers
Answer:
90 ft²
Step-by-step explanation:
Length of her bathroom = 10 ft
Width of her bathroom = 9 ft
Area of Eriasia bathroom = length × width
= 10 ft × 9 ft
= 90 ft²
Area of Eriasia bathroom = 90 ft²
Eriasia should buy 90 square feet of tile
Can someone please help me with this, find the unit rate cost per item which is these chips set up the equation and show the work the answer should be price per chips I’ll mark brainliest please yall
Answers
Answer:$3
Step-by-step explanation:
You always divide y by x. In this case 6/2 when you set up a chart. When you do this you get $3 unit rate.
1 (unit rate) 2
___________=_____
x (unit rate price) 6
Use cross products
1(6)=x(2)
6=2x
_____
2 2
x=3
Answer:
3
Step-by-step explanation:
Attached below .. i hope this is wht u were expecting!!
The answer to this question
Answers
Answer:
2 miles per hour!
Step-by-step explanation:
It shows that it changes by 2 hours each time! :)
Grade 10 math help please show work (30 points) I will mark brainlist too
Answers
Answer:
5) ∅ =3.94°
6) ∅ = 22.19°
Step-by-step explanation:
5) tan ∅ = 3.9/56.67
tan ∅ = 0.0688
∅ =3.94°
6) cos ∅ = 250/270 (500/2 = 250)
cos ∅ = 0.9259
∅ = 22.19°
A person needs to fill 18 water jugs with a hose. Filling the first 3 jugs has taken 5 minutes. How long to finish filling the remaining jugs?
Answers
Answer:
10.8 minutes
Step-by-step explanation:
Given data
We are told that the number of Jugs is 18
Filling the first 3 jugs has taken 5 minutes
let us find the filling rate
Rate= 3/5
Rate= 0.6 Jugs per minute
Hence the rate of filling is 0.6 Jugs per minute
Therefore the time take to fill the remaining 16 jugs is
TIme= Rate*Number of Jugs
TIme= 0.6*18
Time= 10.8 minutes
Marty bought a piece of material that was 68 yard long and a piece that was 48 yard long. Which statement is TRUE? A. 48> 68 B. 68< 48 C. 68> 48 D. 48= 68
Answers
Answer:
C
Step-by-step explanation:
68 is bigger than 48...
Johnathan is driving at a constant velocity on a long stretch road. The distance he travels is dependent on the length of time he drives. What type of variation describes the velocity Johnathan is driving in this situation?
Answers
Answer:
um i think its mph
Step-by-step explanation:
( guys this question is a music question it’s not a math question i just put math subject because they didn’t have music subject!! )
In terms of rhythm, notes are named for ...
A. how they look.
B. how long they last.
C. how fast they are.
D. how high or low-pitched they are.
Answers
Brainliest plz
Answer:
i think its d
Step-by-step explanation:
A sports equipment researcher investigated how different types of wood used to make baseball bats might affect batting. The researcher selected a sample of 80 batters from summer baseball leagues and randomly assigned the batters to one of two groups: the ash bat group or the maple bat group. The mean number of hits for each group was recorded at the end of the season, and the difference in the sample means was calculated. Which of the following is the appropriate inference procedure for analyzing the results of the investigation?
A. A one-sample t-interval for a population mean
B. A one-sample t-interval for a sample mean
C. A matched pairs t-interval for a mean difference
D. A two-sample t-interval for a difference between sample means
E. A two-sample t-interval for a difference between population means
Answers
Answer:
E
A two-sample t -interval for a difference between population means
Step-by-step explanation:
i just took the test
The appropriate inference procedure for analyzing the results of the investigation is option E. A two-sample t-interval for a difference between population means
Analysis the results of the investigation:Since the researcher selected a sample of 80 batters from summer baseball leagues and batters assigned to one of the two groups. So this means that the researcher is interested to know whether the mean no of hits should be different for two groups and both groups are independent to each other.
Therefore, The appropriate inference procedure for analyzing the results of the investigation is option E. A two-sample t-interval for a difference between population means
learn more about mean here: https://brainly.com/question/10132345
EFG is similar to JKL and JKL is similar to QRS which statement is true
Answers
Answer: B EFG is similar to QRS.
Step-by-step explanation: Not hard, JKL is similar to QRS and EFG is similar to JKL so?
A. undefined B. 0 C. 1 D. -1
Answers
Answer:
0
Step-by-step explanation:
Zero .
Cot = 1/tan ∅
But tan ∅= cos∅ / sin ∅
so if ∅/90 then cos 90/ sin 90 x π/2 should be 0
Answer:
The answer is D.) 0
Step-by-step explanation:
JUST DID THE QU
The table represent temperatures for 9 days in February. What is the average temperature?
Answers
Answer:sum =378 according to your new questions.
to find average temperature
use formula
average =sum of temperature /no of measuring day
=378/9=42 is your answer
Find the measure of A in Triangle ABC.
Since we are given
information here, we
can use the following equation to solve for m angle A.
Answers
Answer:
First part= SSS
Second part=0.2
Third part=78
Answer:
A.
On edge.
Step-by-step explanation:
find each measure (EH)
Answers
Answer:
five hundred yessirhjtffg
the unit used to measure the length of the key is
Answers
Answer: millimeter
Step-by-step explanation: millimeter (mm) – a metric unit commonly used to express the length of very small objects like keys, and thickness of small objects like notebook.
What is a possible value of x If -5
Answers
Answer:
ok from the top
Step-by-step explanation:
ok So we back in the mine, got our pick axe swinging from side to side Side, side to side This task a grueling one, hope to find some diamonds tonight, night, night Diamonds tonight Heads up, you hear a sound, turn around and look up, total shock fills your body Oh no it's you again I could never forget those eyes, eyes, eyes 'Cause baby tonight, the creeper's trying to steal all our stuff again
tenth term of 4n-3
thank you
Answers
4n - 3 = 4 * 10 - 3 = 40 - 3 = 37
....
Answer:
tenth term =(4×10)-3
=40-3
=37
35° (14x + 5)° solution
Answers
Answer:
490 + 175
Step-by-step explanation:
35(14+5)
35x14x=490x
35x5=175
490 + 175 = 665x