Erica solved the equation −5x − 25 = 78; her work is shown below. Identify the error and where it was made. (5 points) −5x − 25 = 78 Step 1: −5x − 25 − 25 = 78 − 25 Step 2: −5x = 53 Step 3:negative five times x over negative five = fifty-three over negative five Step 4: x = negative fifty-three over five Group of answer choices Step 1: She should have added 25 to each side. Step 1: She should have divided both sides by −5. Step 3: She should have divided both sides by −5. Step 3: She should have multiplied both sides by −5.

Answer:

The system of equations has no solution.

Step-by-step explanation:

set them equal to eachother. 3x+9=3x-4

Subtract 3x from both sides, giving you 9=-4, which is an equation that is not true because 9 does not equal negative 4. Therefore, there is no solution to this system.

Answer:

[tex]y=\dfrac12x+9[/tex]

Step-by-step explanation:

The product of the slopes of perpendicular lines is -1

Given the slope of Line L is -2, this means that the slope of Line M will be:

[tex]\dfrac{-1}{-2}=\dfrac12[/tex]

[tex]\sf as \ \dfrac12 \cdot -2 = -1[/tex]

If Line M intersects the y-axis at (0, 9) then its y-intercept is 9.

Slope-intercept of a linear equation: [tex]y = mx + c[/tex]

(where m is the slope and c is the y-intercept)

Therefore, the equation for Line M is:

[tex]y=\dfrac12x+9[/tex]

Concluimos que a partir de 21 piezas se gana más en la empresa B.

Si definimos el número de piezas vendidas como x, la cantidad que le pagan en la empresa A es:

A(x) = $6000 + $20*x

Y lo que le pagan en la empresa B es:

B(x) = $6000 + x^2

Queremos ver para que valor de x, se da que B(x) > A(x).

Entoces resolvamos esa inequación.

6000 + 20*x < 6000 + x^2

20x < x^2

20 < x

x debe ser más grande que 20, entonces concluimos que a partir de 21 piezas se gana más en la empresa B.

Sí quieres aprender más sobre inecuaciones, puedes leer:

https://brainly.com/question/23023694

Answer:

C. between 150 and 200 miles

Step-by-step explanation:

To find the average, we need to divide 732 by 4 to get 183. Since 183 is between the numbers 150 and 200, C is the answer to the question.

Answer:

1/64

Step-by-step explanation:

A negative exponent in essence brings your 2^6 value under 1. So your problem would now look like 1/(2^6). From there it is easy simplifying, knowing hat 2^6 = 64. So your answer turns out to be 1/64.

2 to the power minus 6 as a fraction would be equal to 1/64

Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.

The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.

A negative exponent in essence brings  2^6 value under 1.

So  1/(2^6).

From there it is easy simplifying, knowing that;

2^6 = 64.

Therefore, the answer turns out to be 1/64.

2 to the power minus 6 as a fraction would be equal to 1/64

More about the Algebra link is given below.

brainly.com/question/953809

#SPJ2

Answer:

The correct answer would be C. The coordinates of the ENDPOINTS of the segment​

Step-by-step explanation:

It cannot be A, because the segment only moves. It does not change size.

It cannot be B, because the line of symmetry goes down the middle of the segment- the distance remains the same.

Therefore it is C. The coordinates of the ENDPOINTS of the segment​

Answer: 7 tens, 4 ones, 9 tenths, and 2 hundredths.

Answer:

y ≤ -3

Step-by-step explanation:

3y ≤ -9

y ≤ - 9/3

y ≤ -3

Please mark me the brainliest!?!

Step-by-step explanation:

2x + y = 2         subtract 2x from both sides

2x - 2x + y = 2 - 2x

y = -2x + 2

(m = -2, b = 2)

-3x + y = 4        add 3x to both sides

-3x + 3x + y = 4 + 3x

y = 3x + 4

(m = 3, b = 4)

Answer:

A.  m∠A = 45°

Step-by-step explanation:

Vertical angle theorem:  opposite angles are congruent

⇒ 3x = x + 30

⇒ 2x = 30

⇒ x = 15

As m∠A = 3x

⇒ m∠A = 3 × 15 = 45°

Opposite angles are equal

[tex]\\ \rm{:}\dashrightarrow 3x=x+30[/tex]

[tex]\\ \rm{:}\dashrightarrow 2x=30[/tex]

[tex]\\ \rm{:}\dashrightarrow x=15[/tex]

So

Answer:

33.5%

Step-by-step explanation:

First you need to subtract the amount he bought the ticket from the amount he sold it.

$121 ₋ $88

=$33

After that you need to divide the answer you got by the original amount of the ticket multiply it  by 100.

33 ÷ 88 × 100

=37.5%

I hope this helps.

pls mark me as brainliest

Answer:

{8, 10, 12, 18}

Step-by-step explanation:

The domain of a given relation are all the x-values or inputs.

Locate the inputs:

{(8, 4), (10, –3), (12, 0), (18, –1)}

The domain in this given relation is {8, 10, 12, 18}.

Hope this helps.

Answer:

I love it when you think I will answer with 0oop

Answer: $12.875

Step-by-step explanation:

Emma works two jobs. At her day job, she earns $8/hour and works for 3 hours. Total amount earned will be:

= $8 × 3 = $24

She works her evening job for 9 hours and earns $14.50/hour. Total amount earned will be:

= $14.50 × 9 = $130.5

Total amount earned will now be:

= $24 + $130.5

= $154.5

Since she works a total of: 3 hours + 9 hours = 12 hours per day, the amount made on average per hour will be:

= $154.5/12

= $12.875

Answer: line is never ending in both directions

ray is never ending in one direction

Step-by-step explanation:

Answer:A1/d1 And A/B

Sorry i dont really know how to do that just a guess

Answer:

2^x

Step-by-step explanation:

Since we are needing to show how this is written, x is a power so it will be written small and will go to the upper right corner of the 2 :)

When you see a number like this, we are multiplying 2 by intself x times :)

Hope this helps!

Havea great day!!

Please rate and mark brainliest!!

Hey there!

10x+y=7(x+y)=7x+7y

or 10x−7x=7y−y

or 3x=6y

or x=2y ........(1)

Number formed by reversing the digits is yx, i.e.,

10y+x=10x+y−18

Substituting x=2y, we get

10y+2y=10×2y+y18

or 2y=21y−18

or 21y−12y=18

or 9y=18

or y=2

∴x=2y=2×2=4

Therefore, the number is 42.

[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]

Let the two digit number be ' xy '

where, x is the ten's place digit, and y is one's place digit, now let's proceed further ~

The origin number can be written as :

[tex]\qquad \sf  \dashrightarrow \: 10x + y[/tex]

[ because x is at ten's place ]

of the digits are swapped, the new number will be :

[tex]\qquad \sf  \dashrightarrow \: 10y + x[/tex]

According to conditions provided in the question : -

[tex]\qquad \sf  \dashrightarrow \: 10x + y = 7 \times (x + y)[/tex]

[tex]\qquad \sf  \dashrightarrow \: 10x + y = 7x + 7y[/tex]

[tex]\qquad \sf  \dashrightarrow \: 10x - 7x + y - 7y= 0[/tex]

[tex]\qquad \sf  \dashrightarrow \: 3x - 6y = 0 \: \: \: \: \: \: [/tex]

[tex]\qquad \sf  \dashrightarrow \: x - 2y = 0 \: \: \: \: \: \: - (1)[/tex]

here we got our first equation, let's find the other one ~

[tex]\qquad \sf  \dashrightarrow \: (10x + y) - 18= 10y + x[/tex]

[tex]\qquad \sf  \dashrightarrow \: 10x - x + y - 10y = 18[/tex]

[tex]\qquad \sf  \dashrightarrow \: 9x - 9y = 18[/tex]

[tex]\qquad \sf  \dashrightarrow \: x - y = 2 \: \: \: \: \: \: - (2)[/tex]

we got our second equation ~

Now it's time to subtract equation (1) from equation (2) :

[tex]\qquad \sf  \dashrightarrow \:( x - y ) - (x - 2y)= 2 - 0[/tex]

[tex]\qquad \sf  \dashrightarrow \: \cancel{x }- y - \cancel{x} + 2y= 2 - 0[/tex]

[tex]\qquad \sf  \dashrightarrow \: y= 2 [/tex]

hence, value of y is 2, use this value in equation (2) to find x ~

[tex]\qquad \sf  \dashrightarrow \: x - y= 2 [/tex]

[tex]\qquad \sf  \dashrightarrow \: x - 2= 2 [/tex]

[tex]\qquad \sf  \dashrightarrow \: x = 4 [/tex]

Therefore, the required number is xy = 42

the answer to this problem is 63

Answer:

A

Step-by-step explanation:

47+58=105 then you just subtract 7 from 75 and you get 68 than you divide 68 by 2

Answer:

$40, how I got this is I took $10 * 4 late fees and there is your $40

The exponential function is given by y = 13000(0.85)ˣ, the amount of rats in 3 years is 7984

An exponential function is in the form:

y = abˣ

Where y,x are variables, a is the initial value of y and b is the multiplication factor.

Let y represent the population of the chicken after x year.

The initial population of 13000 rats, hence a = 13000

The rat population declining by 15% every year. b = 1 - 0.15 = 0.85

The exponential function is given by y = 13000(0.85)ˣ

In 3 years; y = 13000(0.85)³ = 7984

The exponential function is given by y = 13000(0.85)ˣ, the amount of rats in 3 years is 7984

Find out more on exponential function at: https://brainly.com/question/12940982

Answer:

1/5 is the slope.

Answer:

1/5

Step-by-step explanation:

remember this when finding the slope: [tex]\frac{rise}{run}[/tex]

count one block up and five blocks to the right to create a triangle.

so, the slope is 1/5

Please 5 stars if right!

Step-by-step explanation:

D.the set of all possible output values.

Dilating the triangle TRW would change the size of the triangle

The ordered pair that best represents the location of point R′ is (nRx,nRy)

The coordinates of the point R would be represented as:

R = (Rx,Ry)

The scale of dilation (k) is given as:

k = n

Given that the center of dilation is the origin, the location of point R' would be:

R' =R * k

So, we have:

R' = (Rx,Ry) * n

Evaluate the product

R' = (nRx,nRy)

Hence, the ordered pair that best represents the location of point R′ is (nRx,nRy)

Read more about dilation at:

https://brainly.com/question/3457976

Answer:  (−3n, −5n)

I did the test

Answer:

10,440

Step-by-step explanation:

There is 12k seats in total. 60 sections containing 200 seats. In 1 section of 200 they counted 174 people. Therefore you multiply 174 by 60. 174 being the people in 1 section and 60 being the total number of sections.

Step-by-step explanation:

Use the systematic new AC Method to factor trinomials (Socratic Search)

y

=3x2+7x−6

=3(x + p)(x + q)

Converted trinomial:

y'

=x^2+7x−18

= (x + p')(x + q').

p' and q' have opposite signs.

Factor pairs of (ac = -18) --> (-2, 9). This sum is 7 = b. Then p' = -2 and q' = 9. Therefore,

p ='p/a

= -2/3

and

q ='q/a

=9/3

=3.

Factored form: y = 3(x - 2/3)(x + 3) = (3x - 2)(x + 3)

Answer:

l = √10

Step-by-step explanation:

We're given the value of a as 3 feet and the value of b as 1 feet (because 2/2 = 1). We are to find the value of l using Pythagorean Theorem.

Therefore, the answer is √10 feet.

Answer:

A = 45a + 63 square units

Step-by-step explanation:

Formula of the area of a triangle: [tex]\frac{1}{2}bh[/tex]

Plug in givens:

[tex]\frac{1}{2}(18)(5a+7)\\ \frac{1}{2}(18)(5a+7)\\9(5a+7)\\45a + 63[/tex]