Tobin is solving the equation 3 (x minus 1.25) = 11.25. His work is shown below.

3 (x minus 1.25) = 11.25. 3 x minus 3.75 = 11.25. 3 x minus 3.75 + 3.75 = 11.25 + 3.75. 3 x = 15. 3 x times 3 = 45 times 3. x = 135.

What mistake did Tobin make?

Answers

Answer 1
he was meant to divide by 3 when the equation was 3x=15, not multiply, so he would get the answer x=5

Related Questions

Eliza claims she can create an equation using these cards that has NO solutions. Axel says this is impossible—that every equation created with these cards will have a solution. Who is right?

Answers

Answer:

axel

Step-by-step explanation:

Which of the following best describes the function graphed below? (1 point) A graph shows a straight slanting line that starts at a point on the y-axis and goes down to touch the x-axis. Question 14 options: 1) Nonlinear increasing 2) Nonlinear decreasing 3) Linear increasing 4) Linear decreasing

Answers

Answer:

linear decreasing

Step-by-step explanation:

cause it is a straight line and it's going down so it's decreasing.

Answer:

linear decreasing

Step-by-step explanation:

the answer that will appear before mine is right

(5x-2)cm (3x+14) what is the length of the sides

Answers

Answer:

5xcm−2cm

Step-by-step explanation:

sry if im wrong

What is the slope of the line?

Answers

Answer:

-3/4

Step-by-step explanation:

-3v-2=-2-8v+5v How many solutions? Will mark brainlest

Answers

Answer:

infinite solutions

Step-by-step explanation:

-3v-2=-2-8v+5v

Combine like terms

-3v-2 = -2 -3v

Add 3v to each side

-3v-2+3v = -2 -3v+3v

-2 = -2

Since this is always a true statement, there are infinite solutions

use the law of exponents to rewrite (5^9)^2

will give brainiest and 50 point bet u do not get it right

Answers

Answer:

I'm pretty sure it's:

5x5x5x5x5x5x5x5x5 x 2x2

x reduced by 13 is at least 15

Answers

Answer:

Step-by-step explanation:

x-13≤15

x≤28

Suppose that y is inversely proportional to the 4th power of x, and that y=15 when x=5. What is y when x=7? Round your answer to two decimal places if necessary.

Answers

Answer:

y = 3.91 when x =7

Step-by-step explanation:

y = k / x⁴

Where,

k = constant of proportionality

y=15 when x=5

y = k / x⁴

15 = k / 5⁴

Cross product

15 × 5⁴ = k

15 × 625 = k

9,375 = k

What is y when x=7?

y = k / x⁴

= 9,375 / 7⁴

= 9,375 / 2401

= 3.9046230737192

Approximately

y = 3.91

What equation in slope-intercept form represents the line that passes through the points (1, -6), (-3, 10).

Answers

Slope equation (y2-y1)/(x2-x1)
(10+6)/(-3-1) = 15/ -4 = -3.75
y = -3.75x + b
Plug in any point
-6 = -3.75 + b
b = -2.25
The equation is y= -3.75x - 2.25
I believe, correct me if I’m wrong

Answer:

y = −4x − 2

Step-by-step explanation:

Hope This Helps!

Plz Mark Brainliest!

Have a Happy Thanksgiving!

Somebody help please

Answers

Answer:

[tex]\sqrt{2000}\phantom{a}yards[/tex]

Step-by-step explanation:

For a right triangle, [tex]a^{2} =b^{2} +c^{2}[/tex], if a is the hypotenuse. So, [tex]60^{2} =40^{2} +c^{2}[/tex], and c is the the distance we are trying to find:

[tex]60^{2} =40^{2} +c^{2}[/tex]

[tex]3600=1600+c^{2}[/tex]

[tex]c^{2} =2000[/tex]

[tex]c=\sqrt{2000}\phantom{a} yards[/tex]

Write a unit rate for: 71 inches of cloth for $23.43.

Answers

Answer:

$0.33 per inch

Step-by-step explanation:

Divide cost by inch to get cost per inch.

What is the binary number for 15​

Answers

Answer:

111

Step-by-step explanation:

notice that 1000 in binary is 16, as 1000 in binary would be 2^4 = 16. If you subtract 1 from 1000 in binary, you get 111.

If this helped please give brainliest.

For the function f(x)
Find f(4)

Answers

Answer:

12

Step-by-step explanation:

f(x) = 3x

f(4) = 3(4) = 12

just need to sub in the x value :)

Topic: Functions

If you would like to venture further, you can check out my Instagram page (learntionary) where I post notes and mathematics tips. Thanks!

Answer:

12

Step-by-step explanation:

3x x=4

4x3=12

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An office uses paper drinking cups in the shape of a cone, with dimensions as shown. To the nearest tenth of a cubic inch, what is the value of each drinking cup?

Answers

*see attachment for the dimensions of the cone given.

Answer:

7.9 in³

Step-by-step explanation:

Given:

Height of cone = 4 in.

Diameter of cone = 2¾ in

Radius (r) = ½ of 2¾ = 1.375 in

Required:

Volume of the cup

Solution:

Volume of the cup = volume of a cone

Volume of a cone = ⅓πr²h

Plug in the values of π, r and h into the formula.

Volume = ⅓*3.14*1.375²*4 = 7.9 in³ (approximated to the nearest tenth)

HURRY ASAP HELP




Store A charges $1,200 for repairs with a 6 percent sales tax. Store B charges $1,350 with a 7 percent sales tax. Explain how you would determine the amount of money saved by using Store A instead of Store B?

Answers

Step-by-step explanation:

Store A:

6% of 1,200 is 72

72 + 1,200 = 1,272

Thus, store A has a total of 1,272

Store B:

7% of 1,350 is 94.5

94.5 + 1,350 = 1444.5

Thus, Store B has a total of 1444.5

1444.5 - 1,272 = 172.5

Thus, Store A is cheaper.

Answer:

sales tax- rate×original amount

A- 6/100(1200)=72

B- 7/100(1350)=94.5

If x = 14, which equation is true?
A.3 ( 20 − x ) = 44
B.3 ( 12 − x ) = 6
C.2 ( x − 3 ) = 22
D.2 x − 3 = 22

Answers

Answer:

C.  2 ( x − 3 ) = 22

Step-by-step explanation:

if x = 14

2 ( x − 3 ) = 22

2 (14 - 3) = 22

2 (11) = 22

22 = 22

therefore, the answer is C.

What is the value of 24 – ( - 6 – (5 + 8))?
O A. 5
B. 27
C. 31
O D. 43

Answers

The correct answer is 43

Choose the linear equation written in slope intercept
form that matches each graph

Answers

Answer:B

Step-by-step explanation:the line touches the graph on the y axis at 3 so the y intercept has to be a positive 3. Then it goes up 1 over 3 each time. Meaning it’s Y=1/3X+3

pls heeelp i dont want to fail

Answers

The answer would be 44.88 because who I subtract the largest number from the smallest number.

You have 20 minutes to finish 10 math problems for homework. Write and solve an inequality that
represents how many minutes you can spend per problem.
HURRY PLEASE

Answers

Answer:

one min

Step-by-step explanation:

Answer: 2 minutes

20/10=2

PLZ HELP I WILL GIVE 20 POINTS WHOEVER ANSWERS FIRST:

Answers

Answer:

-2

Step-by-step explanation:

So to find slope you just subtract y^1 - y^2 and divide it by x^1 - x^2

The first point is (2, 1)

The second is (0, 5)

1 is our y^1 and 5 is our y^2

1 - 5 = -4

2 is our x^1 and 0 is our x^2

2 - 0 = 2

So our slope is -4/2, reduced its -2

I hope this helped, please mark Brainliest, thank you!

umm i dont get none of this to be honest

Answers

Are you talking about brainly? If so, Brainly is an app/website where you can ask questions about your homework/ school work. When you first start on brainly you get 20 points? And each question you ask costs points. To get more points, you have to answer other people’s questions. Hope this helped!

URGENT NEED IT NOW I WILL GIVE BRIANLIEST find the slope-intercept of (3,5) and (0,0) Plz give me the equation

Answers

Answer:

m = 5/3

Step-by-step explanation:

the slope is

                    5

                    _

                    3

solve by factoring x^2 -9 =0​

Answers

x = 3 and -3

X^2 - 9 = 0
(X+3)(X-3) = 0

X + 3 = 0
X = -3

X - 3 = 0
X = 3

Jim is building a model airplane. The scale is 1 in : 40 ft. The actual wingspan of the plane is 211 feet. How long will the wings of the model be?

Answers

Answer:

422 that's how long the wingspan will be.

5-10m
WHATS THIS ANSWER?.
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Answers

Answer:

-5 is the answer

Step-by-step explanation:

Which of the equations matches the line shown in the diagram?
A) y=-5/3x B) y=-5/3x-1 C) y=5/3x+1 D) y=5/3x-1/3

Answers

the correct answer it's equation D

Answer:

This is really easy: Its D) y=5/3x-1/3

Step-by-step explanation:

Delilah and a group of friends had excellent service at a restaurant. They would like to give the server a 25 percent gratuity on their $140 bill.

Answers

Answer:

Here we want to calculate the 25% of $140.

Well, first we assume that:

$140 = 100%.

Now, assuming that, we can write the equation:

X = 25%

Where X is the 25% of $140.

Then we have the equations:

$140 = 100%

X = 25%

Let's take the quotient between these equations:

$140/X = (100%/25%)

Now let's solve this for X:

X = (25%/100%)*$140 = 0.25*$140 = $35

Then the tip will be of $35

35

you have to split 140 into 4 parts which is division

your  expression would be 140 divided by 4

The temperature of a liquid in an experiment starts at 0 degrees Celsius. The experiment calls for the temperature of the liquid to change at a rate of –0.6 degree Celsius per minute. How long will it take for the liquid to reach –10.5 degrees Celsius? 2Points Remember to divide to find the minutes.

Answers

Answer:

It will take 17.5 minutes or 17 minutes and 30 seconds to reach -10.5 degrees celsius

Step-by-step explanation:

Starting at 0 degrees, we have a change of -0.6 degree celsius per minute

We want to know how long it will take for the liquid to reach - 10.5 degrees Celsius

The total difference between the two is;

-10.5 - 0 = -10.5

The change per minute is -0.6

So the number of minutes it will take will be;

-10.5/-0.6 = 17.5 minutes

The Ride-It Store rents bicycles.The cost is $8.50 for 1 hour, $13.65 for 2 hours,$18.80 for 3 hours, and $23.95 for 4 hours.If the pattern continues, how much will it cost Nate to rent a bike for 6 hours?

Answers

Answer:

in six hours it would be $34.25

Step-by-step explanation:

The computation of the total cost for 6 hours is shown below:

For one hour it would be $8.50

For two hours

= $13.65 - $8.50

= $5.15

For three hours

= $18.80 - $13.65

= $5.15

For four hours

= $23.95 - $18.80

= $5.15

For five hours

= $23.95 + $5.15

= $29.10

For six hours

= $29.10 + $5.15

= $34.25

Hence, in six hours it would be $34.25

Other Questions
Why are the 10 Commandments significant to people who are not Jewish? * A.they aren'tB.they provide instruction on how to treat each other wellC.like the Code of Hammurabi, the 10 Commandments influenced the laws of many western countriesD.they tell the stories of many gods Evaluate 4xy+4 when x=1/4 and y=3. The value of the expression is .(pls stay off here if you dont know how to do this because idk if yall know how it feels to fail math but im failing an trynna get t up.... pls stay off if u dont know) f(x) = x2 2x +1Find y-intercept and vertex which of these is an element of summarizing and paraphrasing PLEASE HURRY BEING TIMED>To be, or not to be, that is the question:Whether tis nobler in the mind to sufferThe slings and arrows of outrageous fortune,Or to take arms against a sea of troubles,And by opposing end them? To die: to sleep;No more; and by a sleep to say we endThe heart-ache and the thousand natural shocksThat flesh is heir to, tis a consummationDevoutly to be wishd. To die, to sleep;To sleep: perchance to dream: ay, there's the rub;For in that sleep of death what dreams may comeWhen we have shuffled off this mortal coil,Must give us pause: there's the respectThat makes calamity of so long life;This excerpt is an example ofheroic couplet.free verse.blank verse.common meter. A study found a strong correlation between parental bonding and adolescent drug use. Children with stronger bonds to their parents were far less likely to try drugs or alcohol. After examining their data more closely, the researchers discovered that parental bonding was really a predictor for teen religiosity. Consequently, high levels of religiosity, rather than parental bonding, actually prevent drug use. This means that religiosity was a(n) a. paradigm shift. b. issue of reflexivity. c. spurious variable. d. intervening variable. Before Nate did his homework Choose the word that best completes the sentence. When threatened by intruders, the king directed the soldiers to take arms and the city. A fortify B amble mediate D atone 13. What is the best way to use in separating iron parts from a mixture?A. Filter paper help me plsssssssssssssssssss How did Coronado react after he was disappointed by the villages?a.He sent Fray Marcos de Niza back to New Spain.b.He killed a great many Pueblo Indians .c.He took whatever supplies his soldiers needed.d.He did all of the above.Please select the best answer from the choices providedABCD What effect with the enzymes have on the time to make 1 MG of product Mr.West bought merchandise totaling $3,500. His overhead was $1,200. He sold the merchandise for $5,000. Find his percent on the profit based on the cost, to the nearest whole percent.plz answer fast i rlly need it now Suppose that an elementary school starts a recycling program. After one year, the school hasreduced its trash from 144,000 pounds per year to 122,400 pounds per year. Find the percentdecrease in the amount of trash. Rita bought 14 yards of fabric for $73.50. If the cost is proportional to the yardage, what is the constant of proportionality? A. $5.05 per yard B. $5.20 per yard C. $5.15 per yard D. $5.25 per yard E. You can see a person in 1/4 the windows, How many people are visable i need help !!!!!!!!!!!! mark runs 5 miles in 40 minutes. if he continues at the same rate can he run 14 miles in 120 minutes The Great Compromise solved the issue of ______________.A. the way enslaved people would be countedB. representation in the legislatureC. the way the chief executive would be chosenD. providing enough protection of individual rights What is happening in this picture?