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
Ad libitum [116K]
3 years ago
11

Solve the quadratic equation (x-3)2 = 49

Mathematics
1 answer:
Tresset [83]3 years ago
3 0
27.5, because 27.5-3=24.5 and 24.5x2= 49
You might be interested in
How do i solve this exponential equation<br>​
Novay_Z [31]

Answer:

  x = 0 or 1/2

Step-by-step explanation:

Solving an exponential equation of this nature with different bases and coefficients is always a bit of an ad hoc affair. Here, we can divide by the right side expression and make a substitution that turns it into a quadratic.

__

  3\cdot16^x+2\cdot81^x=5\cdot36^x\\\\0.6\left(\dfrac{4}{9}\right)^x+0.4\left(\dfrac{9}{4}\right)^x=1\\\\\textsf{Let $z=\left(\dfrac{4}{9}\right)^x$}\\\\0.6z+\dfrac{0.4}{z}=1\qquad\text{after substitution}\\\\3z^2-5z +2 = 0\qquad\text{multiply by $5z$ and put in standard form}\\\\(3z-2)(z-1)=0\qquad\text{factor}\\\\z=\dfrac{2}{3}\quad\text{or}\quad z=1\\\\x=\dfrac{\log(z)}{\log(4/9)}=\boxed{\dfrac{1}{2}\quad\text{or}\quad 0}

_____
<em>Additional comment</em>

A graphing calculator often solves these very nicely, especially when the equation is put into the form f(x) = 0.

3 0
2 years ago
Which equation, when solved, results in a different value of x than the other three?
Damm [24]

Answer:

i think it might be c

Step-by-step explanation:

tell me if its wrong or not and brain list please

3 0
3 years ago
13. write the ratio as a fraction in simplest form. 30:48
mars1129 [50]
My answers are 13. B ; 14. C ; 15. C.
5 0
3 years ago
8% of 70 is what number? (please explain)
Bingel [31]
Do a proportion
8/100= x/70
Cross multiply and divide
70 x 8= 560
560 divided by 100= 5.6
Answer is 5.6

You also could have done .08 x 70 which is also 5.6
7 0
3 years ago
Arron spends 1/2 of his $800 weekly wage on rent and 1/4 on repaying the loan for his car. How much money does he have left for
Slav-nsk [51]

Answer:

$200

Step-by-step explanation:

Half of $800 is $400, and a quarter of $800 is $200. $800-$400-$200=$200

8 0
4 years ago
Read 2 more answers
Other questions:
  • The probability of a particular event is 3/8 what is the probability that the event will not happen
    10·2 answers
  • How do u know if a problem is arithmetic or geometric?
    12·2 answers
  • Which expression will produce an answer with the fewest significant figures?
    14·1 answer
  • What is 24/75.48 need help plzzzzzzz
    6·2 answers
  • 6. Mary and Steve each travel 845 miles. Mary drove an average of 5 mph faster than Steve and completed the trip in one hour's l
    5·1 answer
  • Please answer this correctly
    12·2 answers
  • What is the greatest common factor of each?
    12·1 answer
  • Look at this graph:
    14·2 answers
  • To reach the roof , how far away from the building should he place the base of the ladder ?
    10·1 answer
  • Write 0.006966 in scientific notation.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!