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
Alinara [238K]
3 years ago
7

What’s the mistake made in the steps to solve the equation below?

Mathematics
1 answer:
zzz [600]3 years ago
3 0

Answer:

The answer is A.

You are dividing by 8, not 10.

You might be interested in
-2(x + 2) = -2x ++ 5x -1
earnstyle [38]

Answer:

-⅗ = x

Step-by-step explanation:

Here is what you get when you distribute the -2 on the left side of the equivalence symbol and combine like-terms on the right side of the equivalence symbol:

-2x - 4 = 3x - 1

Here is the solution:

-2x - 4 = 3x - 1

-3x -3x

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

-5x - 4 = -1

4 +4

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

-5x = 3

----- -----

-5 -5

x = -⅗

I am joyous to assist you anytime.

8 0
3 years ago
Given: M(-4,-1), B(-5,-3) find the midpoint
Dmitry [639]
\bf \textit{middle point of 2 points }\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%  (a,b)
M&({{ -4}}\quad ,&{{ -1}})\quad 
%  (c,d)
B&({{ -5}}\quad ,&{{ -3}})
\end{array}\qquad
%   coordinates of midpoint 
\left(\cfrac{{{ x_2}} + {{ x_1}}}{2}\quad ,\quad \cfrac{{{ y_2}} + {{ y_1}}}{2} \right)
\\\\\\
\left(\cfrac{{{ -5}}-4}{2}\quad ,\quad \cfrac{-3-1}{2} \right)
4 0
3 years ago
Read 2 more answers
Given that x and y are positive integers, solve the equation x² - 4y² = 13​
zvonat [6]
<h3>Answer:  x = 7 and y = 3</h3>

=====================================================

Explanation:

Apply the difference of squares rule

x² - 4y² = 13

x² - (2y)² = 13

(x - 2y)(x + 2y) = 13

Since x and y are positive integers, this means x-2y and x+2y are both integers as well.

The value 13 is prime. Its only factors are 1 and 13

Since the above equation shows 13 factoring into x-2y and x+2y, then we have two cases:

  • A) x-2y = 1 and x+2y = 13
  • B) x-2y = 13 and x+2y = 1

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

Let's consider case A

We have this system of equations

\begin{cases}x-2y = 1\\x+2y = 13\end{cases}

Add the equations straight down

  • x+x becomes 2x
  • -2y+2y becomes 0y = 0 which goes away
  • 1+13 becomes 14

Therefore we have 2x = 14 solve to x = 7

From here, plug this into either equation to solve for y

x-2y = 1

7 - 2y = 1

-2y = 1-7

-2y = -6

y = -6/(-2)

y = 3

You should get the same result if you used x+2y = 13

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

Since we've found that x = 7 and y = 3, notice how case B is not possible

Example:  x-2y = 13 becomes 7-2(3) = 13 which is false.

Also, x+2y = 1 would turn into 7+2(3) = 1 which is also false.

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

Let's check those x and y values in the original equation

x² - 4y² = 13

7² - 4*(3)² = 13

49 - 4(9) = 13

49 - 36 = 13

13 = 13

The answer is confirmed.

4 0
2 years ago
Use a graph to describe the domain and range of each of the functional sequence below
Y_Kistochka [10]

Answer:

ℝ

Step-by-step explanation:

All linear functions have a <em>range</em> and <em>domain</em> of <em>all real numbers</em>.

I am joyous to assist you anytime.

8 0
2 years ago
If f is a function where f = {(1,2), (2,4), (3,6), (4,8)} and g is a function
Bad White [126]

Answer:

(a) {(1, 2), (2,4), (3,6), (4 , 8), (1,3), (3,5), (5,7)}

Step-by-step explanation:

add them

3 0
2 years ago
Other questions:
  • The quotient 600÷2/3 tells about how far a tortoise may move in one hour. find that distance
    10·2 answers
  • A line passes through (2,-7)and (-3,3).Find the slope-intercept form of the equation of the line. Then fill in the value of the
    12·1 answer
  • A cone has a volume of 6 cubic inches. What is the volume of a cylinder that the cone fits exactly inside of
    10·2 answers
  • Express the area of the entire rectangle. you answer should be a polynomial in standard form.
    7·1 answer
  • a) In a simple random sample of 1000 faculty taken among all universities in a country, the number of papers published by the in
    13·1 answer
  • Need help on this please
    11·1 answer
  • Amy bought a new car for 25,000. She paid a 10% down payment and financed the remaining balance for 60 months with an of Determi
    15·1 answer
  • SOMEONE PLEASEEEEEE HELPPPPP ASAPPPP I NEED THE ANSWER
    15·1 answer
  • -3(u+2)=5u-1+5(2u+1)
    6·2 answers
  • Solve this please<br>please​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!