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
juin [17]
3 years ago
5

the sum of three times a number and 2 less than 4 times the same number is 15. which of the following equations could be used to

find the value of the number m, n? explain how you arrived at your choice.
Mathematics
1 answer:
Ulleksa [173]3 years ago
4 0
To solve for a number x,

3x+4x-2=15
7x-2=15
7x=17
x=2 3/7
or x=~2.43

was one of your answer choices either of the first two equations?
You might be interested in
The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systo
PIT_PIT [208]

Answer:

The  estimate is

             52.02  <  \mu  < 55.78

Step-by-step explanation:

From the question we are told that

    The sample mean is \ = x  =  53.9

     The sample size is  n =  24

      The standard deviation is  \sigma =  5.6

 

Given that the confidence level is  90% the level of significance is mathematically represented as

           \alpha  =  100 - 90

            \alpha  =  10 \%

            \alpha  =  0.10

Next we obtain the critical value of  \frac{\alpha }{2} from the normal distribution table.The value is  

           Z_{\frac{\alpha }{2} } =Z_{\frac{0.10 }{2} } =  1.645

The reason we are obtaining critical value of    \frac{\alpha }{2} instead of    \alpha is because    \alpha

represents the area under the normal curve where the confidence level interval (  1 - \alpha ) did not cover which include both the left and right tail while  

\frac{\alpha }{2} is just the area of one tail which what we required to calculate the margin of error

NOTE: We can also obtain the value using critical value calculator (math dot armstrong dot edu)

Generally the margin of error is mathematically represented as

          E  =  Z_{\frac{\alpha }{2} } *  \frac{\sigma }{ \sqrt{n} }

substituting values

         E  =  1.645  *  \frac{5.6 }{ \sqrt{24} }

          E  =  1.880

The  estimate of how much the drug will lower a typical patient's systolic blood pressure(using a 90% confidence level) is mathematically represented as

         \= x  -  E  <  \mu  <  \= x  +  E

substituting values

         53.9  -  1.880  <  \mu  <  53.9  +  1.880

         52.02  <  \mu  < 55.78

5 0
3 years ago
Choose the correct simplification of the expression (4a4b)2. 16a8b 16a8b2 16a6b2 8a8b2
iogann1982 [59]

Given exponential expression : (4a^4b)^2.

<em>According to exponents of exponent rule, we need to distribute whole exponent over exponents of inside terms of parenthesis.</em>

We are given whole exponent 2 there.

We can apply exponents of exponent rule.

Therefore,

(4a^4b)^2 = 4^2 a^{4\times2}b^2

4^2= 16.

a^{4\times2} = a^8

Therefore, 4^2 a^{4\times2}b^2 = 16a^8b^2.

<h3>Correct option is second option 16a^8b^2.</h3>
5 0
3 years ago
Read 2 more answers
If T(n) = 6n - 1 what is the 1st term
Nataliya [291]
T(n) = 6n - 1
T(1) = 6(1) - 1
T(n) = 6 - 1
T(n) = 5
3 0
3 years ago
3. When pasta is cooked, it doubles in weight. When Ms. Morrison finished cooking
Rasek [7]

Answer:

275

Step-by-step explanation:

550 divided by 2 is 275.

8 0
3 years ago
6=m/8 what does m equal
sp2606 [1]

Answer:

m = 48

Step-by-step explanation:

6=m/8

Multiply each side by 8

6*8 = m/8 *8

48 = m

8 0
3 years ago
Read 2 more answers
Other questions:
  • Geometry help will give brainliest solve empty ones
    13·1 answer
  • What is the common difference for the arithmetic sequence: 8.6, 6.2, 3.8, 1.4, −1, −3.4, …
    6·1 answer
  • (Giving 100 pts, help fast!!!) Four congruent square pieces with lengths of sides of 6 cm were cut out of corners of a square pi
    6·2 answers
  • Which of the following shows the extraneous solution to the logarithmic equation below?
    5·2 answers
  • Mr. Jones asked his students to classify the solution(s) to the quadratic equation x^2=24.
    12·1 answer
  • NEED HELP WITH GEOMETRY
    13·2 answers
  • A photograph is 11 centimeters by 15 centimeters. A frame shop charges $1.35 per
    12·1 answer
  • The square below represents one whole.<br> What percent is represented by the shaded area?
    9·1 answer
  • Which equation is correct for these angles?
    6·1 answer
  • Solve: ( 5<br> 13<br> +<br> 3<br> 91<br> ) ÷ ( 20<br> 13<br> −<br> 3<br> 39<br> )
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!