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
monitta
3 years ago
15

The sum of a number and seven is multiplied by four. The result is equal to negative twelve. The value of the number is __

Mathematics
2 answers:
Katarina [22]3 years ago
7 0
The correct value is -10.
7 plus negative 10 equals negative 3.
Negative 3 times 4 equals -12.
Or, (7+-10=-3•4=-12)
tia_tia [17]3 years ago
3 0

⟹Answer:

x = -10

⟹Step-by-step explanation:

<u>Lets Solve!</u>

⟹The first thing we must do is define our variables. Lets look at the problem again:

"The sum of a number and 7 is multiplied by 4. The result is equal to -12."

We can make <u>x the number that is being added</u> to 7.

The sum of x and 7 is multiplied by 4. This expression equals -12.

4(x+7) = -12

⟹Now we use distribute 4 amongst (x+7)

4(x+7) = -12

4x+28 = -12

Next we subtract 28 from both sides.

4x+28 = -12

4x = -40

Last we divide 4 on both sides.

\frac{4x}{4}  = \frac{-40}{4}

➧ x = -10

<u>Woohoo! Brainliest Appreciated! Hope I helped!</u>

You might be interested in
Write an equation to represent the measures of the angles
marin [14]

Answer:

x = 72

Step-by-step explanation:

These angles are complementary so they add up to 90:

x + 18 = 90

x = 90 - 18

x = 72

6 0
3 years ago
Leonardo is running the 100 meter dash at his school’s track meet. After 78 meters, his right shoe falls off! He can’t stop to p
AveGali [126]

100 meters -78 meters =21 m


6 0
3 years ago
Read 2 more answers
The Director of Admissions at Kinzua University in Nova Scotia estimated the distribution of student admissions for the fall sem
VMariaS [17]

Answer:

Variance = 24900

Standard Deviation = 157.7973        

Step-by-step explanation:

We are given the following in the question:

Number of admissions:    1000     1200    1500

Admissions Probability:     0.6        0.3       0.1

Formula:

E(x) = \displaystyle\sum x_iP(x_i)\\E(x) = 1000(0.6) + 1200(0.3) + 1500(0.1)\\E(x) = 1110\\E(x^2) =  \displaystyle\sum x_i^2P(x_i)\\E(x^2) = (1000)^2(0.6) + (1200)^2(0.3) + (1500)^2(0.1)\\E(x^2) = 1257000

Variance =

\sigma^2 = E(x^2) - (E(x))^2\\\sigma^2 = 1257000 -(1110)^2\\\sigma^2 =24900

Thus, the variance is 24900.

Standard Deviation =

\sigma = \sqrt{\sigma^2} = \sqrt{24900} = 157.7973

Thus, the standard deviation is 157.7973

7 0
3 years ago
Use the digits 3,7,1 and 5 to write a number that rounds to 1,700
Hitman42 [59]
To how many sig figs or decimal places? Could use 1735 if rounded to 2 significant figures (2sf)
5 0
3 years ago
Read 2 more answers
Simplify the expression:<br><br><br><br> 4b - 24 + 19<br><br> 4p - 5p - 30p<br><br> 4.2v - 5 - 6.5v
Licemer1 [7]
For the first expression we will only simplify the constants:

4b - 24 + 19 ——> 4b - 5

The second expression only has variables so we simplify the whole expression

4p - 5p - 30p = -31p


The third expression we will only simplify the variables

4.2v - 5 - 6.5v ——> -2.3v - 5
4 0
3 years ago
Other questions:
  • What is the volume of the cone with 27 as the height and 4 as the radius?
    15·1 answer
  • Julie gives 7 pieces of candy to each of her friends. If Julie gives all of her candy away, which amount of candy could have bee
    6·2 answers
  • Write a multiplication sentence to describe each model
    14·1 answer
  • fairveiw has 330 seventh grade students, and is ratio of boys to girls is 6:5. salem has 360 seventh grade students, and its rat
    14·1 answer
  • Jack determined that triangle FGH has the interior angle
    15·2 answers
  • Joe bought a house. His payments are $800 per month.<br> How much will he pay in 5 months' time?
    15·2 answers
  • What is the square root of 100^3
    7·2 answers
  • 20 PTS!! PLEASE HELP
    10·2 answers
  • Rewrite the expression (x+3)(3x+8)-3X(x+3)
    15·1 answer
  • Solve for X.<br> <img src="https://tex.z-dn.net/?f=%5Cfrac%7B3%7D%7Bx%7D%20%3D9" id="TexFormula1" title="\frac{3}{x} =9" alt="\f
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!