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?
Tobin did not distribute the 3 correctly.
Tobin should have subtracted 3.75 from each side.
Tobin should have divided by 3.
Tobin did not make a mistake.

Answers

Answer 1

The solution of the equation expressed as 3 (x minus 1.25) = 11.25 is

A = 3 ( x - 1.25 ) = 11.25

The value of the equation is 5

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be A

Now the value of the equation A is

The equation A is expressed as 3 (x minus 1.25) = 11.25

Substituting the value in the equation , we get

A = 3 ( x - 1.25 ) = 11.25

3 ( x - 1.25 ) = 11.25

On simplifying the equation , we get

Divide by 3 on both sides, we get

x - 1.25 = 3.75

Adding 1.25 on both sides of the equation , we get

x = 5

So, the value of x is 5

Hence , The solution of the equation expressed as 3 (x minus 1.25) = 11.25 is  A = 3 ( x - 1.25 ) = 11.25

The value of the equation is 5

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Answer 2

Answer: Tobin should have divided by 3

Step-by-step explanation: I took the test please mark brainliest


Related Questions

What is the inverse of the statement below?
XY
A. y X
B. 2X
C. yx
O
o
D. Xy

Answers

9514 1404 393

Answer:

  B.  ¬x ⇒ ¬y

Step-by-step explanation:

The inverse negates both the antecedent and the conclusion, leaving them in the same relationship with the implication arrow.

I’m not sure if I’m right but can someone help.!

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Answer:

4/9

Step-by-step explanation:

because it is 0.44444444 repeating :)

Answer:

I think this is right. I checked with my mom, a math wiz, and she says its 11/25. But that can't be simplified, and its not an option. Try simplifying the fraction 11/25.. Hope it helps

Step-by-step explanation:

Five Star For right answer with work shown!

Answers

Answer:

B,B,A,D,C

Step-by-step explanation:

3х - 5 = -11 what is x

Answers

Answer:

-2

Step-by-step explanation:

Add 5 to both sides to get

3x-5+5=-11+5

and simplify to get

3x = -6

x = -2

Answer:3-

Step-by-step explanation:

It's going to be negitive

HELP ASAP 6TH GRADE MATH

Answers

Answer:

The answer is C

Step-by-step explanation:

Bruh. This guy lazy

What is the missing statement in this proof? A. AxWY – AZYW B. AYAZ & AWAX C. WY=XZ e D. WY || XZ​

Answers

I’m so sorry for this edisnsns azyw b

Answer: B. YAZ- WAX

Step-by-step explanation: Got 5/5 on the PLATO test. hope it helps. :)

HELP AND YOU WILL GET BRAINLIEST!!!!!!!!

4 liters of oil cost $10.00. Find the cost per liter of oil.
Group of answer choices

$2.00

$3.00

$10.00

$2.50

$400

Answers

Answer: $2.50

$10.00 per 4 liters

10/4=2.5

I hope this is good enough:

Answer:  because i just want points and 1 +2= 3

Step-by-step explanation: because  if u add 2 with 1 u will get 3

Two larger cubes are made out of unit cubes. Cube A is 2 by 2 by 2. Cube B is 4 by 4 by 4. The side length of Cube B is twice that of Cube A.
Is the surface area of Cube B also twice that of Cube A? Explain or show your
reasoning
Is the volume of Cube B also twice that of Cube A? Explain or show your
reasoning

Answers

The side length of Cube B is twice that of Cube A.

The surface area of Cube B is not twice that of Cube A.

The volume of Cube B is not twice that of Cube A.

What is the surface area of a cube?

The surface area of a cube is the total of all of its covered faces. Six times the square of the cube's side length is the formula for surface area.

Here, we have

Given: Two larger cubes are made out of unit cubes. Cube A is 2 by 2 by 2. Cube B is 4 by 4 by 4. The side length of Cube B is twice that of Cube A.

Cube A is 2×2×2.

Cube B is 4×4×4.

The side length of Cube A is 2 and the side length of Cube B is 4. So, the side length of Cube B is twice that of Cube A.

The surface area of a cube is

Area = 6(side)²

Using this formula we get

Area of cube A = 6(2)² = 24

Area of cube B = 6(4)² = 96

96 is 4 times 24.

Hence, the surface area of Cube B is not twice that of Cube A.

The volume of a cube is

Volume = (side)³

Using this formula we get

The volume of cube A = (2)³ = 8

The volume of cube B =  (4)³ = 64

64 is 8 times 8.

Hence, the volume of Cube B is not twice that of Cube A.

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PLEASE ANSWER ASAP!!!!!!!
if 20% of some value is 400, then what is the missing value?

Answers

Answer:

Step-by-step explanation:

If 20% of some value is 400 in the missing values 80 20% x 400 is 80

The missing value is 2000 .

How to calculate the percentage of an amount ?A value or ratio that may be stated as a fraction of 100 is referred to as a percentage in mathematics. If we need to compute a percentage of a number, we should divide it by its whole and then multiply it by 100. The proportion therefore refers to a component per hundred. Per 100 is what the term percent signifies. The letter "%" stands for it.There is no dimension to percentages. As a result, it is known as a dimensionless number. When we say a number is 50% of anything, we imply that it is 50% of everything.As in 0.6%, 0.25%, etc., percentages can also be expressed as decimals or fractions. The grades earned in any topic are calculated in terms of percentages in academics.

Calculations :

                  =       Based on the given conditions, formulate =  40/20%

                  =      Convert the percentage to decimals = 400/0.2

                  =      Multiply both the numerator and denominator

                          with the same integer =   4000/2

                  =      Cross out the common factor =  2000

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The boiling point of water in the Fahrenheit scale is 212 degrees ?

True
False

Help

Answers

The answer fam is........True (212°F)

the answer is true. hope this helps

I can identify and use inverses to solve equations with one variable

Answers

Answer:

[tex] \boxed{x = 1.1614}[/tex]

Step-by-step explanation:

[tex] \boxed{question \: \: 2.} \\ ( - 4 ) { \times 10}^{x} - 50 = - 108 \\ ( - 4 ) { \times 10}^{x} = - 58 \\ { 10}^{x} = \frac{ - 58}{ - 4} \\ {10}^{x} = 14.5 \\ x = log_{10}(14.5) \\ x = log(14.5) = 1.1613680022 \\ \boxed{x = 1.1613680022}[/tex]

♨Rage♨

The average weight of 6 people in an elevator is 173 pounds. A 7th person gets on and now the average weight is 165 pounds. How much did the 7th person weigh?

Answers

8 pounds because you divide

Help me answer this its due in like 3mins!! ILL GIVE YOU A BRAILLEST

Answers

Answer:

0.15 or 3/20

Step-by-step explanation:

Answer:

3/20

Step-by-step explanation:

9/10 = 0.9

0.9/6 = 0.15

0.15 = 3/20

Solve for y x = 3y - 24​

Answers

Answer:

y = 1/3x + 8

Step-by-step explanation:

Step 1:

x = 3y - 24           Equation

Step 2:

x + 24 = 3y            Add 24 on both sides

Step 3:

1/3x + 8 = y              Divide

Answer:

y = 1/3x + 8

Hope This Helps :)

write a rule that represents the function of these ordered pairs. (0,-8), (1,-7), (2,-6), (3,-5), (4,-4)

Answers

Answer:

The answer is -10 sorry if im wrong

Tracey paid $130 for an item that was originally priced at $500. What percent of the original price did Tracey pay?

Answers

Answer:

2.6%

Step-by-step explanation:

Set up a proportion: [tex]\frac{130}{500} = \frac{x}{100}[/tex]  Cross multiply, then divide: 130 × 100 = 1300, 1300 ÷ 500 = 2.6So, Tracey spent 2.6% of the original price

I hope this helps!

what is p minus 6? i cant find the answer

Answers

Answer:

What does P stand for

Step-by-step explanation:

It should say

Answer:

p - 6

is just 5 i think

Step-by-step explanation:

if this helps please mark brainlist

What is the relationship between the continental drift hypothesis and the theory of
plate tectonics?

Answers

Answer:

Plate tectonics explains why Earth's continents are moving; the theory of continental drift did not provide an explanation. Therefore, the theory of plate tectonics is more complete. It has gained widespread acceptance among scientists.

Step-by-step explanation:

Do some research on it.

In ΔHIJ, i = 53 cm, ∠I=120° and ∠J=30°. Find the length of j, to the nearest 10th of a centimeter.

Answers

Answer:

30.6

Step-by-step explanation:

The sine rule of trigonometry helps us to equate the side of the triangles to the angles of the triangles. The length of the side j is 30.6 cm.

What is Sine rule?

The sine rule of trigonometry helps us to equate the side of the triangles to the angles of the triangles. It is given by the formula,

[tex]\dfrac{Sin\ A}{\alpha} =\dfrac{Sin\ A}{\beta} =\dfrac{Sin\ A}{\gamma}[/tex]

where Sin A is the angle and α is the length of the side of the triangle opposite to angle A,

Sin B is the angle and β is the length of the side of the triangle opposite to angle B,

Sin C is the angle and γ is the length of the side of the triangle opposite to angle C.

Given the length of i is 53 cm, while the measure of the ∠I is 120°. Also, the measure of ∠J is 30°. Therefore, the length of the side j is,

[tex]\dfrac{Sin\ A}{\alpha} =\dfrac{Sin\ A}{\beta} =\dfrac{Sin\ A}{\gamma}\\\\\dfrac{Sin\ I}{i} =\dfrac{Sin\ J}{j} \\\\\dfrac{Sin\ 120^o}{53} =\dfrac{Sin\ 30^o}{j} \\\\j = \dfrac{Sin\ 30^o \times 53}{Sin\ 120^o}\\\\j = 30.5995 \approx 30.6\rm\ cm[/tex]

Hence, the length of the side j is 30.6 cm.

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2/3 divided by 2 1/2

Answers

Step-by-step explanation:

Step 1: Multiply to get the lowest common denominator

Step 2: reciprocate thw second fraction(flipping the values)

Step 3: Cancel out values.

Learning Task 1. Tell whether each picture models a quadratic function or not.
Justify your answer.
GIVEN
Answer
WHY?

Answers

The picture for this question is given below.

Answer: All of them models quadratic function.

Step-by-step explanation: A quadratic function is of the form

f(x) = ax² + bx + c, with coefficient a≠0.

This function has a U-shape graphic called parabola. It has a vertex, i.e., a point where the curve changes, which is "classified" as minimum, if the parabola opens up; and as maximum, if the parabola opens down.

The y-intercepts are the points where the curve touches the y-axis and x-intercepts, if they exist, are the roots of the function.

The three pictures below shows three U-shaped curves opening down. This means the three parabolas are representation of 3 different quadratic functions, with a 3 vertex points that are maximum.

Quadratic functions are functions that follow a uniform curve path.

The first picture does not represent a quadratic function, while the other two pictures model a quadratic function.

To identify a quadratic function, we make use of the following observations.

The function must follow a uniform curved pathThe function must have a vertex i.e. maximum or a minimumThe function must be represented as: [tex]\mathbf{y = ax^2 + bx + c}[/tex]

From the question (see attachment for pictures), we can see that:

The first picture models several quadratic functions, because several uniform curves are represented on the picture.The second and the third picture model exactly one quadratic function, because both pictures have a uniform curve, and they have a single maximum point.

Hence, the first picture does not represent a quadratic function, while the other two pictures model a quadratic function.

Read more about quadratic functions at:

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Given:-2x=34 prove x=-17

I need help

Answers

Step-by-step explanation:

-2x=34 prove x=-17

34=34

because

-2 time -17 is 34

plzzzzzzzzzz hellppppp​

Answers

Answer:

Step-by-step explanation:

With of them?

What is the standard form equation of the line shown below?

Answers

Bro how are we supposed to know there is no picture -_-

What is n in the equation (3+4n)/n=7b?

Answers

Aannsswweerr: -3/4-7b

Step-by-step explanation: I smart for a 3yrs old kid. And I don't even need a diAper but my 17 yrs old sister does so she weirdo...      

HEY, I also have good news. I JUST GOT POTY TRANED!! YA Boi.

My sis told me she was on her period but then I told her there was this thing called subject and predicate and how she isnt supposed to have a period at the end of her statement because it wouldnt make any sense... and ya, it didnt go well cause' she put on a tantrum.

But the weird thing is that Google said this "Tantrums are most common between the ages of one and four, then decrease when children start school." SO HOW COME I DIDN"T HABE A TANTRUM and SHE HAD ONE!!..                     life makes no sense

Between which two consecutive integers does 87 lie?

Answers

The two numbers are 43 and 44.

Which type of structure means the sales people are only paid when they make sales?
A. Straight salary
B. Salary plus bonus
C. Salary only
D. Commission only

Answers

Answer:

D

Step-by-step explanation:

commission is what you get when you make sales

Answer:

D. Commission only

I hope this helps!

Ron is seeking a loan with a simple interest rate of 7% per year. If he wants to borrow $4,500, then how much will he be charged in interest after 3 years?

Answers

Answer: He will be charged $915 in interest after 3 years

Step-by-step explanation:

7% ÷ 100 = 0.07

0.07 × 4500 = 315

315 × 3 = 945

---------------------------------

945 + 4500 = 5445 ( Don't worry about this)

The simple interest charged to Ron for the money he borrowed is $945.

Given that, principal = $4500, rate of interest = 7% and the time period = 3 years.

What is the simple interest?

Simple interest is a method to calculate the amount of interest charged on a sum at a given rate and for a given period of time.

Simple interest is calculated with the following formula: S.I. = P × R × T, where P = Principal, R = Rate of Interest in % per annum, and T = Time, usually calculated as the number of years.

Now, simple interest = (4500 × 7 × 3)/100

= 45 × 7 × 3

= $945

Therefore, the simple interest charged to Ron for the money he borrowed is $945.

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can you find all the angles please, sorry

Answers

Answer:

m∠ 1 = 128

m∠ 2= 52

m∠3 = 47

m∠4 = 133

m∠5 = 81

Step-by-step explanation:

not sure if this is correct

Help??????????????????????

Answers

Answer:

i think A diagonals

just a guess ok

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