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
Angelina_Jolie [31]
3 years ago
11

Developing Proof: Fill in the reasons for this algebraic proof. Given: 5x + 1 = 21 Prove: x = 41) 5x + 1 = 21 Give the reasons f

or the following steps in the proof 1) 5x + 1 = 21 1) a. given 2) 5x = 20 2) b. ? 3) x = 4 3) c. ? ... number 1 is provided ... the given ... In other words how do you get from step 1 to 2 and step 2 to 3? *​
Mathematics
1 answer:
jenyasd209 [6]3 years ago
6 0

Answer:

21 = 21

Step-by-step explanation:

5x + 1 = 21

-1           -1

5x = 20

__    __

5        5

x = 4

5x + 1 = 21           First substitute x for 4

5(4) + 1 = 21        Then continue to solve the problem to get the proof

20 + 1 = 21          

21 = 21

You might be interested in
(2x + 7y = -24<br>18x+y=12 solve by substitution​
const2013 [10]

Answer:

x = .87, or when approximated to a fraction, 27/31

y = -3.67, or when approximated to a fraction, -1287/350

Step-by-step explanation:

Lets start by rewriting out our equations

2x + 7y = -24

18x + y = 12

Lets solve for a y value; the second equation is easiest, as the y value has no coefficient (the number that is multiplied times a variable). To do this, lets move the 18x to the other side. Now our two equations look like:

2x + 7y = -24

y = -18x + 12

Next, lets plus the second equation into the first equation in regards to y.

2x + 7(-18x + 12) = -24

Now, lets solve!

2x -126x + 84 = -24

Then, combine your terms!

-124x = -108

Divide by (-124)!

x = -108/-124

x = 27/31

Now that we know x, lets plug this back in to the first equation to find y!

2(27/31) + 7y = -24

1.74 + 7y = -24

7y = -25.74

y = -3.67, or when approximated to a fraction, -1287/350

4 0
4 years ago
If you vertically shift the quadratic parent function f(x)=x^2 down nine units what is the equation of the new function
sleet_krkn [62]

Answer:

{x}^{2}  - 9

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Jane wrote all natural numbers from 5 to 12. including 5 and 12.
Elina [12.6K]

Answer:

5, 6, 7, 8, 9, 10, 11 and 12 are the natural numbers between 5 and 12 including them, therefore Jane wrote 8 numbers. natural numbers start at positive 1 and go up by whole numbers infinitely, hope this helps

8 0
3 years ago
0.6 divided by what equals 0.6?
xxTIMURxx [149]

Answer:

Step-by-step explanation:

1

7 0
3 years ago
Read 2 more answers
Find the value of x in the picture please
Marianna [84]

Answer:

Option B. The value of x is 20

Step-by-step explanation:

we know that

<u>The intersecting chords theorem</u>  states that the products of the lengths of the line segments on each chord are equal.

so

In this problem

(x)(x-11)=(x-8)(x-5)\\x^{2}-11x=x^{2}-5x-8x+40\\-11x=-13x+40\\2x=40\\x=20

3 0
4 years ago
Other questions:
  • Find the domain of the following function.<br> <img src="https://tex.z-dn.net/?f=f%28x%29%20%3D%20%20%5Csqrt%5B7%5D%7Bx%20-%209%
    5·1 answer
  • A reproduction of Claude Monet's water lilies has Dimensions 34 and a half inches by 36 and a half inches find the area of the p
    13·1 answer
  • What is the value of the expression 9 + 4 n minus 1 when n = 3?
    14·2 answers
  • The area of the triangle
    6·1 answer
  • A group of 11 friends heads to the pub on quiz night. The maximum size allowed for a quiz team is 3 and nobody wants to compete
    11·1 answer
  • I need help. with algebra nation
    5·1 answer
  • Between 20 and 28 students signed up for the chess club. The students could not be divided exactly into groups of 2,3,4 or 5. Ho
    10·1 answer
  • What is the slope of the line containing the points (6, -4) and (4, -6)?​
    11·2 answers
  • What were the maya doing by AD 200 pls help meee
    9·1 answer
  • Write the phrase as an expression.<br><br> 5 less than 8<br><br> An expression is
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!