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
Montano1993 [528]
3 years ago
5

Solve x2 = 12x – 15 by completing the square. Which is the solution set of the equation? Solve x2 = 12x – 15 by completing the s

quare. Which is the solution set of the equation?
Mathematics
2 answers:
Helga [31]3 years ago
8 0

Answer:

D on edge

Step-by-step explanation:

Svetlanka [38]3 years ago
6 0

Answer: 6+\sqrt{21}\ \text{and}\ 6-\sqrt{21}

Step-by-step explanation:

Given

Quadratic equation is

x^2-12x+15=0

Solving by completing the square method

\Rightarrow x^2-2\cdot 6\cdot x+15=0\\\text{add and subtract 36}\\\Rightarrow x^2-2\cdot 6\cdot x+15+36-36=0\\\Rightarrow x^2-2\cdot 6\cdot x+36+(-36+15)=0\\\text{using}\ (a-b)^2=a^2+b^2-2ab\\\Rightarrow (x-6)^2-21=0\\\Rightarrow (x-6)^2=21\\\Rightarrow x-6=\pm \sqrt{21}\\\Rightarrow x=6\pm \sqrt{21}

The solution set of the equation is 6+\sqrt{21}\ \text{and}\ 6-\sqrt{21}

You might be interested in
Write each expression in scientific notation. Put your answer for EACH part in the text box. You should have 5 answers for this
Zolol [24]

Answer:

A) 4 × 10^-2

B) 7.2 × 10^-2

C) 3.25 × 10^-5

D) 3 × 10^-3

E) 2.3 × 10^-1

Step-by-step explanation:

7 0
3 years ago
What is the value of the numerical expression 5/8 - 5/12( 3 - 1/4 ) + 2/3?
victus00 [196]
0.14583333333 is the answer, in fraction form it is = <span>14583333333/100000000000</span>
5 0
3 years ago
Abner wants to create a shopping budget where he spends less than $80 per month on clothes. He also wants to spend at least thre
strojnjashka [21]

Answer:

D) Abner can spend $60 per month on school clothes and $20 per month on gym clothes and stay within his budget.

Step-by-step explanation:

In the problem it states that Abner will spend 3 times more on (s)school clothes than (g) gym clothes.

So it would appear as s ≥ 3g.

If we plug in $60 as s (school clothes) and $20 as g (gym clothes), the statement is true.

60 ≥ 3(20)

60 ≥ 60. These numbers make the linear system true.

If you have trouble with this, an easy way to find this answer is simply creating the linear system that represents the problem, (he will buy 3 times more school clothes than gym clothes) s ≥  3g and plug in each variable from the answer choices until you find the variables that make the linear system true.


6 0
3 years ago
Read 2 more answers
Find equation of circle passing through points (-2,2) ,(2,4) and (4,6).
Vinvika [58]

Answer:

get scammed lol ok sure fine ok i will never

7 0
3 years ago
How do I add fractions with different denominations?
nordsb [41]
1.<span>Write down the fractions.
2.</span><span>Find a common denominator.
3.</span><span>Multiply both numbers on the first fraction by the bottom number of the second fraction.</span><span> 
4.</span>Multiply both numbers on the second fraction by the bottom number of the first fraction. 
5.Line both fractions up side by side with their new numbers.<span> 
6.</span>Add together the numerators of the two fractions.<span> 
7.</span><span>Take the common denominator that you figured out in Step 2 and add it on the bottom of your new numerator.
8.</span>Put the new numerator on top and the new denominator on bottom.
9.<span>Simplify and reduce.</span>
7 0
3 years ago
Other questions:
  • Malik is standing outside in the sun. Malik
    13·1 answer
  • What is the 25th term of this arithmetic sequence? 3, 9, 15, 21, 27, ...
    6·1 answer
  • Δ ABC is isosceles. Angles B and C are congruent. If m∠B = (5x + 5)° and m∠C = (7x - 25)°, Find m∠A. A) 10° B) 15° C) 20° D) 80°
    8·2 answers
  • A company makes yellow golf balls and white golf balls The table shows the company’s sales of yellow golf balls
    6·1 answer
  • Rounded 121580 to the nearest thousand
    6·1 answer
  • The population of a city can be modeled by P(t) 3810(1.0005)7t , where P(t) is the population after t years. Which function is a
    10·1 answer
  • Points A,B, and on circle P. What is the m ACB
    9·2 answers
  • What do I do with the “y = -f(x) +6” given to find the Domain and Range?
    7·2 answers
  • Find the factors and zeros of 6x^2 +8x-28=2x^2 + 4
    9·1 answer
  • Find the EXACT volume of the cone above. Show your work in the box below. Be sure to include correct units.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!