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
Nadya [2.5K]
3 years ago
13

The difference when 7 less than a number is subtracted from twice the number is 12. what is the number?

Mathematics
1 answer:
ipn [44]3 years ago
6 0
It is 5......2x-(x-7)=12  proof:  2*5-(5-7)=12
               2x-x+7=12           10-(-2)=12
                x=12-7                 10+2=12
                x=5                        12=12

You might be interested in
Solve the equation for x, where x is a real number (5 points): <br> -2x^2 + 5x + 2 = -3
Juli2301 [7.4K]
Add 3 to both sides so that the equation becomes -2x^2 + 5x + 5 = 0.
To find the solutions to this equation, we can apply the quadratic formula. This quadratic formula solves equations of the form ax^2 + bx + c = 0
                              x = [ -b ± √(b^2 - 4ac) ] / (2a)
                              x = [ -5 ± √(5^2 - 4(-2)(5)) ] / ( 2(-2) )
                              x = [-5 ± √(25 - (-40) ) ] / ( -4 )
                              x = [-5 ± √(65) ] / ( -4)
                              x = [-5 ± sqrt(65) ] / ( -4 )
                              x = 5/4 ± -sqrt(65)/4
The answers are 5/4 + sqrt(65)/4 and 5/4 - sqrt(65)/4..
5 0
3 years ago
Does anyone know this?
Flura [38]
Answer: A

Step by step explaining:
4.25x4.25x4.25=
76.76
Then if you round it would get you to your answer.
4 0
3 years ago
Read 2 more answers
The daily sales at a convenience store produce a normal distribution with a mean of $1,250 and a standard deviation of $125. The
timama [110]

Answer:

0.6844 is the required probability.        

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = $1,250

Standard Deviation, σ = $125

We are given that the distribution of daily sales is a bell like shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

We have to find

P(sales less than $1,310)

P( x < 1310) = P( z < \displaystyle\frac{1310 - 1250}{125}) = P(z < 0.48)

Calculation the value from standard normal z table, we have,  

P(x < 1310) =0.6844= 68.44\%

0.6844 is the probability that sales on a given day at this store are less than $1,310.

4 0
3 years ago
Using the rest of my points to ask this, please answer quickly :)
TEA [102]

Answer:

C

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).
fenix001 [56]

Answer:

2, 7, 114

Step-by-step explanation:

(3 + 0.5x)(38 - 4x)

114 + 19x - 12x - 2x²

-2x² + 7x + 114

7 0
3 years ago
Other questions:
  • Please help!! The question is in the photo above​
    7·1 answer
  • 1. Solve for x:<br> 3(2x – 1) – 10 = 8 + 5x<br> A. -7<br> B. -3<br> C. 19<br> D. 21
    15·2 answers
  • Answer the questions when examining the data.
    11·1 answer
  • What is the value of this expression when g=-3.5?<br> 8-12g-51
    13·1 answer
  • 100 POINTS!!! will give BRAINLIEST to the person who does all 3 correctly! With explanation!
    9·2 answers
  • Jim’s picks 16 quarts of berries.He needs 21/4 quarts to make a batch of Jam. If he saves 21/2 quarts of berries to ea, how many
    13·1 answer
  • 20 The second term of a geometric sequence is 14.5 and the fifth
    6·1 answer
  • Find Ms. Buggie's mistake in the following problem. Then, give what the correct answer should be.
    8·1 answer
  • Find the volume of the following square pyramid​
    14·2 answers
  • Hello !!! please help me &lt;3 will give brainle and 25 points please help !!!!
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!