Mathematics High School

Eduardo solved the following inequality, and his work is shown below:

−5(x + 4) ≥ 4x − 38
−5x − 20 ≥ 4x − 38
−9x − 20 ≥ −38
−9x ≥ −18
x ≥ 2

What mistake did Eduardo make in solving the inequality?

a.When dividing by −9, he did not change the direction of the sign.
b.He subtracted 4x from both sides when he should have added.
c.He added 20 to both sides when he should have subtracted.
d.He did not make a mistake.

Answers

Answer 1

Answer:

It's Option D

Step-by-step explanation:

All of Eduardo's steps are justified.

Answer 2

Answer:

D

Step-by-step explanation:

Related Questions

helpp this is characteristics of quadratic functions

Answers

Answer:

Vertex: (-2,16)

AOS: 16

Max or Min: Max

X intercepts: (-6,0) (2,0)

Y intercept: (0,12)

Step-by-step explanation:

A line, L, has the equation y = 5x – 1.
Write down the gradient of line L.

Answers

Answer:

5

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope (gradient) and c the y- intercept )

y = 5x - 1 ← is in slope- intercept form

with gradient = 5

Somebody help please!!!

Answers

Answer: x=26

Step-by-step explanation:

Alternate EXTERIOR angles are angles located the exterior of the parallel lines and on opposite sides of the transversal . Is a pair of alterate exterior angles supplementary angles or congruent angles?

Answers

Answer:

Supplementary

Step-by-step explanation:

What is 28% of 76.

Answers

Answer:

21.28

Step-by-step explanation:

If you plug it in to your caculator you would have 21.28

Please help me!!!!!!!!

Answers

Answer:

try to copy and paste on gooogle and i think the answer is going to pop up

Step-by-step explanation:

i need the answer asap

Answers

Answer:What the question?

Step-by-step explanation:

Answer:

U didn't ask a question lollz

Step-by-step explanation:

33.2 x 55
please answer fast I will mark brain

Answers

Answer:

1826

Step-by-step explanation:

Answer:

1826

Step-by-step explanation:

your welcome

always, sometimes, or never.
in an isosceles right triangle, the ratio of the measure of the angles is 1:1:2

Answers

The ratio is always 1:1:√2

Can someone help me please

Answers

Answer:

3^12

Step-by-step explanation:

when a power is to the power, you multiply the exponents

it’s three to the eighth power i think!

Simplify this expression

2 x x x 3 x y
(The 2nd ‘x’ is algebra)

Answers

Answer:

the answer is. .6xy..........

Answer:

6xy

Step-by-step explanation:

Represent 36÷4=9 using subtraction

Answers

Answer:

You can do 36-4 -4 -4 -4 -4 -4 -4 which equals 4.

Step-by-step explanation:

Hope this helps :)

david earns $1.50 per hour more than peter. together, they earn $940 if they both work 40 hours in a week. how much money per hour do david and peter earn?

Answers

Answer:

469.25

Step-by-step explanation:

peter=x

david=x+1.50

x+(x+1.50)=940

x=940-x-1.50

2x=940-1.50

2x=938.5

x=938.5/2

x=469.25

Carson invested $2,700 in an account paying an interest rate of 1.6% compounded
continuously. Assuming no deposits or withdrawals are made, how much money, to
the nearest cent, would be in the account after 5 years?

Answers

Answer:

its not right

Step-by-step explanation:

Answer:

2924.88

Step-by-step explanation:

y - 7 = 21 Your answer should be the value for the variable y.

Answers

Answer:

28 would be the answer

Step-by-step explanation:

because 21+7= 28

AE'C'D' is the image of AECD after a line reflect. Use a compass and
straightedge to construct the line of reflection. Your final answer should be exactly
one blue line.
compass
segment
ray
line
undo
Select a tool above.
D
E
с

Answers

A,C,D there you go!!

Calculate and express your answer in Decimal from 1/2×17

Answers

Answer:

8.5

Step-by-step explanation:

8.5

Because when you multiply it would be 17/2. 8 times 2=16 that leaves .5

PLEASE HELP ME FIND THE CORDINATES FOR THESE GRAPHSSS PLEASE ILL GIVE YOU BRAINLIEST AND 25 POINTS

Answers

1. (-1,-1) (2,-2)
2. (-3,0) (2,0)
3. (-4,-3) (-1,2)

DF
bisects EDG. Find the value of x. The
diagram is not to scale.
4x+72 10x 31

Answers

The answer is 102 because u have to multiply then divide

what is 4 to the 7th power

Answers

Answer:

16384

Step-by-step explanation:

The solution for 4 to the 7th power can be expressed as 16,384.

What is 4 to the 7th power?

To calculate 4 to the 7th power, we need to multiply 4 by itself seven times. Let's break it down step by step:

4¹ = 4 {4 to the power of 1}

4² = 4 x 4 = 16 {4 to the power of }

4³ = 16 x 4 = 64 {4 to the power of 3}

4⁴ = 64 x 4 = 256 {4 to the power of 4}

4⁵ = 256 x 4 = 1024 {4 to the power of 5}

4⁶ = 1024 x 4 = 4096 {4 to the power of 6}

4⁷ = 4096 x 4 = 16384 {4 to the power of 7}

Therefore, 4 to the 7th power has a solution equal to 16,384.

Read more about power here: https://brainly.com/question/29288036

#SPJ6

can you help me with this

Answers

Answer:

c

Step-by-step explanation:

c is just an expression it doesnt have an inequality

need help asap

Katherine was out at a restaurant for dinner when the bill came. Her dinner came to $22. After adding in a tip, before tax, she paid $28.38. Find the percent tip.​

Answers

Answer:

my name is katherine....

Step-by-step explanation:

its also 29% ^^

HELP ASAP PLS. Analyze the reflectional symmetry of the image.

How many lines of symmetry does this image have?

0
1
2
4

Answers

Answer:

2

Step-by-step explanation:

Answer:

zero

Step-by-step explanation:

truss

Diagram shows the composite solid formed by a cuboid and a right prism. Trapezium LMNP is the uniform cross section of the prism. It is given the volume of the composite solid is 444cm³. Calculate the length, in cm of MN​

Answers

Answer:

MN = 7 cm

Step-by-step explanation:

Well the volume we can separate into pieces

first the ABCDEFGH (? you know this cuboid)

which has a volume of

[tex]V = AB\cdot BC\cdot CH\\\\V = 3*6*(3+JY+4)[/tex]

if you ask where does the 4 come from

it comes from LP = KB = YC and JY + YC =JC

so

[tex]V = 18(7+MX)[/tex]

this is because JY = MX

the other volume is of BCNPKLXY (hope you understand which one)

and the volume is

[tex]V = BP*PN*NX\\\\V=8*6*4\\\\V = 192[/tex]

and the last one is KYXLMJ (the top "triangle")

the volume is

[tex]V = \frac{LX*XM}{2}*LK\\\\V = \frac{6*MX}{2}*8\\\\V= 6*4*MX\\\\V=24MX[/tex]

so now add them up

and has to equal 444

[tex]V_T = 18(7+MX)+192+24MX\\\\V_T = 126+18MX+192+24MX\\\\V_T = 318+42MX\\\\444=318+42MX\\\\444-318=42MX\\\\126=42MX\\\\MX = 3[/tex]

and finally we know that MN = MX + XN = 3+4 = 7

so here is our answer MN = 7 cm

a couple of notes

[tex]1.\:\angle LXM = 90\\\\2.\:\angle KYX = 90[/tex]

3. the units don't matter due to the fact that everything is in cm

4. see the picture below to get a better idea of which prism I am talking of

5. tell me if you have questions :D

4x-9y=-48
x=-3.

what is x and y ?​

Answers

Answer:

x=-3 and y=4

Step-by-step explanation:

hope this helps!

Is (-5, -5) a solution of y> - 2x +4?

Answers

The ordered pair is not a solution to the equation

can u plz answer this? its for my sister

Answers

Answer:

p= 4y+15

Step-by-step explanation:

Thanks me later

Marks as brainlist if you like my work

Consider the two expressions. Expression 1 Expression 2 9x+x 2(5x) Which statement is true? Expression 1 is equivalent to Expression 2 because the two expressions have the same amount of terms. Expression 1 is equivalent to Expression 2 because the two expressions have the same amount of terms. Expression 1 is equivalent to Expression 2 because the two expressions have the same value regardless of which value is substituted into them. Expression 1 is equivalent to Expression 2 because the two expressions have the same value regardless of which value is substituted into them. Expression 1 is not equivalent to Expression 2 because the two expressions do not have the same number of variables. Expression 1 is not equivalent to Expression 2 because the two expressions do not have the same number of variables. Expression 1 is not equivalent to Expression 2 because the two expressions do not simplify to equivalent expressions. Expression 1 is not equivalent to Expression 2 because the two expressions do no

Answers

This makes no sense
Expiation

Sushil was thinking of a number. Sushil doubles it, then adds 20 to get an answer of 25.7. What was the original number?

Answers

Answer:

2.85

Step-by-step explanation:

2x+20=25.7

2x+20-20=25.7-20

2x=5.7

2x/2=5.7/2

x=2.85

please HELP me!
What is the solution to the system of equations?

Answers

Answer: (9,7)

Step-by-step explanation:

Other Questions
Susie ran 195 miles last month. She needs 80% more to reach her training goal. How many miles, in all, will she run to reach her goal? Please, this is really important! This system of segregation continued in America for nearly 300 years.O TrueO Falsehelp What are the origins of the Cold War? How and Why did it start? order to create the box plot: Solve for a side in right triangles what types of forces can move an object? What is 2+2 Im stuck on the question help me asap. Which statement best explains why the resolution was adopted ? Suppose a normally distributed set of data with 7800 observations has a mean of 188 and a standard deviation of 18. Use the 68-95-99.7 Rule to determine the number of observations in the data set expected to be below a value of 242. Round your result to the nearest single observation. What is the maximum mass that can hang without sinking from a 50-cm diameter Styrofoam sphere in water OMG HELP THIS IS DUE JANUARY 29TH A ride in a taxi cost $3.50 plus $0.35 for every fourth mile traveled. If Sam travels x miles, then which of the following algebraic expression represents the trip?a) $3.50+$1.40xb) $3.50+$0.35xc) $3.85xd) 0.35x+$3.50x what is the meausure of angle XYZ Please help, in a hurry!!Will mark brainliest!!!Match each system of linear equations with the correct number of solutions.One solutionInfinitely many solutionsNo solution3x - y = 46x - 2y = 8-3x + y = 72x - 4y = -8y = -4x - 5y = -4x + 1 1. Which sentence best summarizes the article, A Life Together?Even though their appearance shocked or fascinated most people they met, Eng and Chang had the same hopes, dreams, and cares that all humans share.Eng and Chang were a source of fear and fascination for the people who came to their shows or saw them as children.Eng and Chang may have looked strange, but their lives were just like everyone elses in the village where they were born.When Eng and Chang started managing their own careers, they became much happier and more successful. The ratio of cups of grape juice to cups of orange juice to make fruit punch is 5:3 you are making a batch and will use 10 cups of grape juice Question 3 of 10Ifyou consistently workyour job.it's possible that you will become burned out atA. full timeB. undertimeC. overtimeD. part time There are 3 people in a room, and we are curious whether two of them have their birthday in the same month. We record the triplet that describes the month of birthday for each person. E.g. (Oct, Jan, Jul) is one possible triplet/outcome. (Since each month applies to a specific person, (Oct, Jan, Jul) is not the same as (Jan, Jul, Oct) and so order is important.) a. How many possible outcomes are there I need help please and thank you WILL MARK BRAINIEST Mon amie est brsilienne. Elle vient ____ Brsil de la Brsil de Brsil du Brsil simplify square root of 8