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
MA_775_DIABLO [31]
3 years ago
5

A certain positive number is multiplied by 4, and then the result is subtracted from the original number. The result is 21 less

than 0. What is the number?
Mathematics
2 answers:
tatiyna3 years ago
7 0

Answer:

The answer is 7

Step-by-step explanation:

Let the positive number x

Then multiply by 4 : 4x

Subtracted by the number which is x-4x

Then we have x-4x=-21

: -3x=-21

X= -21/-3

X= 7

stira [4]3 years ago
4 0

Answer:

The number is 7

Step-by-step explanation:

certain positive number: x

x is multipled by 4:

4x

result of this is subtracted from the original number:

so original number minus 4x,

x - 4x

the result is 21 less than 0, this means negative 21

x - 4x = 0 - 21 = -21

do algebra:

-3x = -21

multiply both sides by -1

3x = 21

divide both sides by 3

x=7

(certain positive number: x) is equal to 7

You might be interested in
What is 9.56 in simplest fraction form?
guapka [62]
9/56 is already in its simplest form. You CANNOT make it more reduced than this
4 0
3 years ago
Compare and Contrast Graph y = 2x + 5 and y=-13x+5. Describe how these lines are alike and how they are different. *​
krek1111 [17]

Here are a couple I found:

<u>Similarities</u>:

  • They have the same y-intercept of (0,5).
  • They are both in slope-intercept form.

<u>Differences</u>:

  • The line of y = -13x + 5 "falls" from left to right. The line of y = 2x + 5 "rises" from left to right.
  • They have different x-intercepts. (y = 2x + 5 intersects (-\frac{5}{2}, 0) while y = -13x + 5 intersects at (\frac{5}{13}, 0)

<u></u>

<u>Explanation</u>:

Slope-intercept form is y = mx + b, and by looking at the equations, they both already fit that format, with m as their slope and b as their y-intercept. Also, since they both have a 5 as that "b," their y-intercepts are the same: (0,5).

As for differences, we can see that the coefficient in place of that "m" is positive in y = <u>2x</u> + 5 and negative in y = <u>-13x</u> + 5. Therefore, one line would rise due to their slope being positive and one would fall due to their slope being negative. They also have two different x-intercepts, which we can calculate by substituting 0 in place of the y, then isolating x.

4 0
2 years ago
Ed works 5.8 hours each day ,if ed make 8$ per hour how much will he ear in 60 days
Nina [5.8K]

Answer: he will make $2784 in 60 days

5 0
3 years ago
Read 2 more answers
Please help this seems impossible.
MatroZZZ [7]

Answer:

hlo XD

no its not looking difficult

it is difficult

6 0
2 years ago
The regular price of a tablet case is $38.45. During a sale, the case was marked as 25% off. What was the approximate price of t
Pani-rosa [81]
C 28.84 just multiply 38.45 by .25 then you should get 9.6125 you subtract 38.45 by 9.6125 and get 28.84
6 0
3 years ago
Read 2 more answers
Other questions:
  • 10. Which number sentence shows the<br> number of marbles that are either<br> red or blue?
    15·1 answer
  • In a class of 666, there are 222 students who forgot their lunch.
    8·2 answers
  • Felicia is solving the expression -5(3x+2)+10x. Gregory is solving the expression -12-4x+?+?x. Both students simplified their an
    5·1 answer
  • Please explain how you got it
    7·1 answer
  • Does 2/3 = 7/16?..........................
    15·2 answers
  • Explain how you would solve -5/8 divided by 2/3 and what the solution is?
    14·1 answer
  • Let AB be the line segment beginning at point A(0, 3) and ending at point B(6, -10). Find the point P on the line segment that i
    11·2 answers
  • Write the simplest polynomial function for each set of zeros<br><br> Zeros = -2, 5, -1
    14·1 answer
  • The vertices of a rectangle are R(–5, –5), S(–1, –5), T(–1, 1), and U(–5, 1). After translation, R' is the point (–11, –11). Fin
    11·1 answer
  • Last one, thank you so much everyone who's helping &lt;3
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!