Mathematics High School

a student concluded that the solution to the equation startroot 2x+1 endroot +3=0 is x=4 do you agree? explain why or why not.

Answers

Answer 1

Answer:

X=4

Step-by-step explanation:

Given the equation

√2x+1 + 3= 0

Subtract 3 from both sides

√2x+1 +3 +3 = 0-3

√2x1 = -3

Square both sides

{√2x+1)² =(-3)²

2x+1 =9

2x= 9-1

2x = 8

x = 8/2

x = 4

Hence I agree that the solution is x = 4 based on the explanation above

Related Questions

|-10| divided by 2 x |5|

Answers

Answer:

Step-by-step explanation:

|-10| divided by 2 x |5| would equal 1.

Answer:

Step-by-step explanation:

The absolute value of -10 is 10. Divide that by what I'm assuming is 2 times the absolute value of 5 (5) is 10. 10 divided by 10 is 0.

PLEASE HELP WILL MARK BRAINLIEST
WHICH OF THESE IS EQUIVALENT TO 4^-3 ?
(-4)(-4)(-4)
3^4
(-1/4)(-1/4)(-1/4)
1/4^3

Answers

First one pretty obvious

Points (-2, 4) and (-1, 1) lie on the same line. Which of the following equations represents the line

Answers

Answer:

y = -3x - 2

Step-by-step explanation:

Given the coordinates (-2, 4) and (-1, 1), we are to find the equation of a line passing through the points.

The standard form of the equation is expressed as;

y = mx+c

m is the slope

m = y2-y1/x2-x1

m = 1-4/-1+2

m = -3/1

m = -3

get the y-intercept c;

Substitute m = -3 and any point say (-1,1) into the equation y = mx+c

1 = -3(-1) + c

1 = 3 + c

c = 1-3

c = -2

Get the required equation;

y = mx+c

y = -3x + (-2)

y = -3x - 2

Carissa earns $450 per week for a 40 hour work week plus $16.83 per hour for each hour of overtime after 40 hours. Write an equation that would be used to determine her weekly wages where, W, is her wages and, V, is the number of overtime hours worked.

Answers

Answer:

W = 450 + 16.83V

Step-by-step explanation:

For 40 hours Carissa

earning = $450

earning for 1 hour of over time = $16.83

multiplying both side by V

earning for v hour of over time = $16.83*V = $16.83V

weekly wage(W) = earning for 40 hours + earning for V hour of over time

W = 450 + 16.83V

Thus equation will be as given below for weekly earning

Which of the following equations will produce this graph?

Answers

Answer:

Insert a photo of the graph???

Step-by-step explanation:

what graph? if there is one i dont see it TBH

I need help, can somebody plz help

Answers

Answer:

Step-by-step explanation:

is the amount that savings or investments grows called a principal

Answers

Principal is also the original amount of investment made in an asset, separate from any earnings or interest accrued. For example, assume you deposit $5,000 in an interest-bearing savings account. At the end of 10 years, your account balance will have grown to $6,500.

the bottom of a 15 foot ladder is placed 3 feet back from the wall. How far up the wall will the top of the ladder reach? ( round to 1 decimal place.
a) 15 feet
b) 18 feet
c) 14.7 feet
d) 15.3 feet

Answers

Answer:

It’s c

Step-by-step explanation:

It’s simple

HELP PLEASE Which of these mappings is a function?

Answers

Answer:

B; x is the one that's a function because for every input there is one output. for all the other ones a x-value has two y-values and that's not function.

Step-by-step explanation:

solve 6x^2 - 12x + 24 = 0 by completing the square

Answers

Answer: [tex]\quad x=1+\sqrt{3}i,\:x=1-\sqrt{3}i[/tex]

Step-by-step explanation: [tex]x_{1,\:2}=\frac{-\left(-12\right)\pm \sqrt{\left(-12\right)^2-4\cdot \:6\cdot \:24}}{2\cdot \:6}[/tex]

[tex]x_{1,\:2}=\frac{-\left(-12\right)\pm \:12\sqrt{3}i}{2\cdot \:6}[/tex][tex]x_1=\frac{-\left(-12\right)+12\sqrt{3}i}{2\cdot \:6},\:x_2=\frac{-\left(-12\right)-12\sqrt{3}i}{2\cdot \:6}[/tex][tex]x=1+\sqrt{3}i,\:x=1-\sqrt{3}i[/tex]

Solve for x. 47x=27 x=849 x=12 x = 2 x = 4 pls help

Answers

Answer: 50089

Step-by-step explanation:

plz help plz plz plz

Answers

Answer:

The answer is A

Step-by-step explanation:

Can't tell u da step

please help me
I don't answer this
I'll give brilliance

Answers

Answer:

2 oz.

Step-by-step explanation:

2 eggs is 4 oz. of oil so 4/2 =2 oz for 1 egg

2 :) hope this helps

Write an equation in point-slope form for the line through the given point with the given slope
(8,-3);m= -1/4

Answers

Answer: y+3= -1/4(x-8)

Step-by-step explanation: so if y-y1=m(x-x1) and y1= -3 and x1=8 and m=(-1/4) u just plug in those number to the equation

25 POINTS AND BRAINLIEST!! Clay wants to ride a Ferris wheel that has a radius of 80 feet and is suspended 9 feet above the ground. The wheel makes 6 revolutions in one minute. Find the period and amplitude.

Answers

Answer:

Step-by-step explanation:

Linear velocity and angular velocity are related by the formula:

v = ωr

ω = n2πr/t, where n is the number of rotations, t is the time taken, r is the radius.

ω = 2 x 2π x 25/1

ω = 100π

v = 100π x 25

= 2500π feet per minute

help find this please

Answers

Answer:

Step-by-step explanation:

AB=10 and BC=20 What is AC

Answers

25 I think so I may be Incorrect

Answer:

Step-by-step explanation:

A to B is 10

B to C is 20

You add them together and you get 30. A straight line is equal to 180.

You divide 30 to 180 and you get is 6.

BRAINLIST
Question 1
1 pts
Last Friday Zainab had $23. Over the weekend she received some money for
a good report card. She now has $41. How much money did she receive?
Which equation represents this problem?
O 41 x 23 - z
OZ + 23 =41
O 23 + 41 = 2
Oz/23 = 41

Answers

It’s b
Z+23=41
Because you don’t know what z is

Billy has a gift card with a $160 balance. He buys several video games that cost $40 each. After the purchases, his gift card balance is $40. Enter an equation to help find out how many video games Billy bought.

Answers

Answer:

160÷3=40

Step-by-step explanation:

that is the answerrrrrrrrrrrrrrrrrrrrrrrrrrr

Which fraction is represented by point A on the number line?

Answers

-1/4

((20 word minimum dont mind ))

make x the main subject
6x+a=5(x+t)

Answers

Answer:

x=5t-a

Step-by-step explanation:

Answer:

x = 5t − a

do you need the procedure?

a drum has a diameter of 18 in and is 16 in deep find the volume

Answers

Answer:

Volume is approximately 4071.5 in³

Step-by-step explanation:

V= πr²h

V=π(9)²(16)

Gavin works as a salesperson at an electronics store and sells phones and
phone accessories. Gavin earns a $12 commission for every phone he sells
and a $3.50 commission for every accessory he sells. On a given day, Gavin
made a total of $135 in commission and sold 12 more accessories than
phones. Determine the number of phones sold and the number of accessories
sold.

Answers

Answer: Hence, there are 6 phones and 18 accessories sold.

Since we have given that

Let number of phones sold be 'x'

Let number of accessories sold be 'y'.

Commission for every phone = $12

Commission for every accessory = $3.50

Total commission = $135

And Difference between accessories and phones sold = 12

According to question, we get that

Using both the equations, we get that

x=6 and y = 18

will give brainliest (9th grade geometry)
If the scale factor of Figure A to Figure B is 7:2, find the perimeter of Figure A.

Answers

Answer:

122.5 units

Step-by-step explanation:

The proportion would be between the perimeters and the given ratio:

7/2 = p/p

Where P is the perimeter of the bigger figure and p is the perimeter of the smaller figure.

Remember that the perimeter is the sum of all sides, using all given values and solving for P, we have

7/2=P/9+5+9+12

7/2=P/35

7(35)/2=P

P=245/2=122.5

Therefore, the perimeter of Figure A is 122.5 units.

If you're good at math, explain this.

Answers

Answer:

I think your correct :)

Step-by-step explanation:

Yess okay I was clicking "add answer" for like a thousand times :D

anywayssss....

I agree with your first 2 answers and it might be a glitch cause that's how it was with my last school years online quizzes but I'm not positively sure about your third answer cause I haven't done the work yet... just make sure you took all the numbers and added them together then divided them by 8 cause there's 8 groups.

ngl I cant tell you what's wrong with the second question so I'm thinking somethings wrong with the coding but alrighty...

<3 Enjoy,

Dea

Apples cost $0.95 per pound. What equation is used to find C,
the total cost of p pounds of apples?

А:c=0.95p
B:c=p+0.95
C:0.95C=p
D:0.95+C=p

Answers

Answer:

a 0.95

Step-by-step explanation:

times the number the person bought if they ask

3a−1=2a
show work, please

Answers

Answer:

a = 1

Step-by-step explanation:

3a - 1 = 2a

3a - 2a - 1 + 1 = 2a - 2a + 1

a = 1

Answer:

Your answer is A = 1

Step-by-step explanation:

You would subtract 3a from 2a

so it would be -1 = 1a

Then divide by 1 and your answer is A= 1

47)Find the slope of the line between the two points given.

a. (-2,3) and (10.-15)

b. (-2,-6) and (-2, 10)

c. (7, 6) and (7.-12)

Answers

A) slope is -3/2, equation is y=-3/2x+0
B) slope is 2, equation is x=-2
C) slope is 7, equation is x=7

Hope this helped! If any questions, feel free to ask! :D

can someone help me on this

Answers

Answer:

A. The balloon rises 1 mile every 1/5 minute.

Step-by-step explanation:

1. Height = 1/5Time

2. For every mile risen, it takes 1/5 Minutes.

or if its easier to understand the other way around

For every 1/5 minutes, the balloon rises 1 mile

I hope my answer is correct and that you get a good grade!

Raisins (x) that sell for $1.60 per pound are mixed with chocolate chips (y) that sell for $2.45 per pound to make 17 pounds of a mixture. The mixture sells for $2.00 per pound. Which system of linear equations can be used to find the amount of each ingredient in the mixture?
A) xy = 17
1.60x + 2.45y = 34
B) x + y = 17
1.60x + 2.45y = 34
C) x + y = 17
1.60x + 2.45y = 17
D) x + y = 17
1.60x − 2.45y = 34

Answers

Answer: B) x + y = 17

1.60x + 2.45y = 34

Step-by-step explanation:

Cost of x = $1.60 per pound

Cost of y = $2.45 per pound

Total pounds of x and y = 17

Cost per pound of mixture = $2

Total number of pounds of the mixture :

x + y = 17

Since the cost per pound of the mixture = 2

Hence ;

(Cost of x * number of pounds of x) + (Cost of y * number of pounds of y)

(1.60 * x) + (2.45 * y) = (cost per pound of mixture * total number of pounds of the mixture)

1.60x + 2.45y = 2 * 17

1.60x + 2.45y = 34

Answer: answer is B

Step-by-step explanation:

Other Questions

Who should be interested in the topic chosen for a research paper?a.Whoever writes the paperB.Whoever grades the paperC.Whoever reads the paperD.All of these Which phrase completes the table? A radioactive isotope has half life of 10dsys. what is the time required for the activity of the isotope to fall to a 16th of it's original value? Hi I rlly could use some help with this! I'm not the best at math and I'm rlly struggling with this assignment its a couple questions long! I will give brainiest and 10 given points!Info:In this activity, you will find out how many cars the baseball team needs to wash before it starts making a profit. The team spent $75 setting up the car wash, and they are charging $5 per car for a wash.1.The first step in modeling this situation is to track how much money the baseball team will take in. Write an equation to represent the amount of money collected in dollars, y, in terms of the number of cars washed, x. Ignore the setup cost.2.The equation you wrote in part A accounts for money collected. However, it does not account for the money the baseball team spent to set up the car wash. What do you need to do to the equation in part A to account for the setup cost?3.Now that you have an idea of how much money the baseball team will collect and how much it will spend, youre ready to write an equation modeling the situation. Write an equation representing the profit made on the car wash in dollars, y, in terms of the number of cars washed, x, after expenses.4.You now have an equation to model the finances of the car wash. What is the value of the profit when the baseball team washes 0 cars? What point represents this value? What does the y-value of this point mean in terms of the problem?5.The baseball team will break even when the amount of money it has received equals the amount of money it spent. In other words, the team breaks even when the profit is equal to zero. How many cars does the baseball team have to wash to break even? What point represents this value? What does the x-value of this point mean in terms of the problem?Pls help!!! Which art movement was dedicated to exploring the unconscious mind?A. ExpressionismO B. SurrealismO C. RomanticismOD. Impressionism In what ways did Shays Rebellion reveal the weaknesses of the Articles of the Confederation?Shays rebellion pls help me The slope of a line on the coordinate plane can be calculated using any two points on the line and one outside point.O TrueO False Last Monday morning, the trash collectors Blank Space__________ my old broken bike from the curb. Which word completes the sentence with the correct principal part of the verb? Question 20 options: bringed took brought taken Solve the following equation: 2(3x - 5) + 7 = 4 - 9(x - 1).A.11/15B.16/15C.8/3D.11/3 12. Which of the following is not one of the aspects that the self-determination theory argues humans need to have?A) CompetenceB) AutonomyC) Relatedness to othersD) Love Help ASAP!!! Its 6th grade work Which mapping diagram does not represent a function? What are some question you could ask a historian about the Yorktown Campaign? What is the metaphor in the third stanza - what does the speaker mean?Indian Boy Love Song (#2)I never spokethe languageof the old womanvisiting my motherin winters so coldthey could freezethe tongue whole.I never held my headto their thin chestsbelieving in the heart.Indian women, forgive me.I grew up distantand always afraid. Which is an example of an object increasing its kinetic energyQuestion 3 options:an airplane after landing on a level runway.a rocket before launch.a train stopped at the station.a mouse running faster after spotting a cat. When circumstances are right, most materials undergo a process called thermal expansion. Which statement best describes the cause and effect of thermal expansion? Group of answer choices Matter is heated, and its particles spread out more. Matter is heated, and its particles move closer together. Matter is cooled, and its particles move closer together. Matter is cooled, and its particles spread out more. Both the U.S. Congress and the Georgia General Assembly are bicameral. This means that each of these legislative bodies has ___ parts. Group of answer choices 3 2 7 How did the Twenty-fourth Amendment to the Constitution affect African Americans?By allowing citizens to directly elect senators, it gave African Americans a greater voice in the government.O By eliminating poll taxes, it meant more African Americans could vote.O By defining citizenship, it meant all African Americans were entitled to due processBy banning slavery, it meant millions of African Americans were free from bondage. The table below shows the scores on a math test. David 75 Aaron 75 Ashley 60 Gina 75 Andrew 75 Kei 95 Monica 100 Anna 60 Lucas 75 Jennifer 65 The number of standard deviations between a score and the mean score is indicated by a z-score. What was Ashley's z-score on the math test? a. 1.1 c. -1.1 b. 60 d. -15.5 What are the different options and sizes for the computer mouse?