1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Setler79 [48]
1 year ago
10

12What mistake did the student make when solvingtheir two-step equation?(a)b) If correctly solved what should the value of be?

Mathematics
1 answer:
mixas84 [53]1 year ago
4 0

Given the equation:

\frac{x}{6}+3=-18

(a) You can identify that the student applied the Subtraction Property of Equality by subtraction 3 from both sides of the equation:

\frac{x}{6}+3-(3)=-18-(3)

However, the student made a mistake when adding the numbers on the right side.

Since you have two numbers with the same sign on the right side of the equation, you must add them, not subtract them and use the same sign in the result. Then, the steps to add them are:

- Add their Absolute values (their values without the negative sign).

- Write the sum with the negative sign.

Then:

\frac{x}{6}=-21

(b) The correct procedure is:

1. Apply the Subtraction Property of Equality by subtracting 3 from both sides (as you did in the previous part):

\begin{gathered} \frac{x}{6}+3-(3)=-18-(3) \\  \\ \frac{x}{6}=-21 \end{gathered}

2. Apply the Multiplication Property of Equality by multiplying both sides of the equation by 6:

\begin{gathered} (6)(\frac{x}{6})=(-21)(6) \\  \\ x=-126 \end{gathered}

Hence, the answers are:

(a) The student made a mistake by adding the numbers -18 and -3:

-18-3=-15\text{ (False)}

(b) The value of "x" should be:

x=-126

You might be interested in
Write the standard form of the equation of the circle with center (-5,-7) that passes through the point (7,5).
shutvik [7]

Answer:

(x + 5)² + (y + 7)² = 288

Step-by-step explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

The radius is the distance from the centre (- 5, - 7) to the point on the circle (7, 5)

Use the distance formula to calculate r

r = √ (x₂ - x₁ )² + (y₂ - y₁ )²

with (x₁, y₁ ) = (- 5, - 7) and (x₂, y₂ ) = (7, 5)

r = \sqrt{(7+5)^2+(5+7)^2} = \sqrt{12^2+12^2} = \sqrt{288}

Hence

(x - (- 5))² + (y - (- 7))² = (\sqrt{288})², that is

(x + 5)² + (y + 7)² = 288

4 0
3 years ago
Fill in the blank and dropdown menus to form a true statement below.​
Pavlova-9 [17]

Answer:

It's polyhedron, not polygon

Because above figure has merely 10 sides.

so the polyhedron above has 10 sides, each of them has 20°.

so total degree in polyhedron is > 180(n-2)

>180(10-2)

> 180×8

> 1440

Step-by-step explanation:

Hope it helps you

5 0
3 years ago
How is angle a related to angle d? A) vertical angles B) alternate interior angles C) alternate exterior angles D) corresponding
Art [367]

Answer:

because they are across from each other vertically

Step-by-step explanation:


3 0
3 years ago
Write an informal proof to show triangles ABC and DEF are similar.
jek_recluse [69]

Answer:

a

Step-by-step explanation:

3 0
3 years ago
Lace edging is sold by the foot for $0.80 or by the foot for $1.99. Which is more expensive
vampirchik [111]

Answer:

$1.99 is more expensive.

Step-by-step explanation:

Given:

One type of lace edging cost $0.80 per foot

Another type of lace edging cost $1`.99 per foot.

We need to find which is more expensive.

In $0.88 where one's place is 0.

In $1.99 where one's place is 1.

By comparing the one's place obviously $1.99 more expensive.

Hope you will understand the concept.

Thank you.

6 0
3 years ago
Other questions:
  • True or false if a function y = f(x) satisfies dy/dx = y, then y = e^x
    5·1 answer
  • If a bag contains 10,500 ounces (oz) of sand, about how many pounds (lb) does it contain? [1 pound= 16 ounces]
    11·2 answers
  • Pamela babysits for a family down the street. She earns $25 each time she visits. Write an expression that could be used to find
    8·1 answer
  • Plan G is paid £14,000 for a concert. If the money made is split at 2:5 between Plan G and the arena. How much money did the are
    5·1 answer
  • A study found that the mean amount of time cars spent in drive-through of a certain fast-food restaurant was 136.6400 seconds. A
    13·1 answer
  • The midpoint of AC is B(5, -8). One endpoint is A(1, 12). What are the coordinates of endpoint C?
    15·1 answer
  • Someone help I been stuck on this for 10 mins
    5·2 answers
  • 2 ( 3x - 1) = -6x -2​
    14·2 answers
  • -1 1/5 + -3/5 = ? please help asap
    14·1 answer
  • Question 6<br> Find the distance between A (-1, 2) and B(-4, 6).<br> units
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!